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All the ideas for 'Logical Pluralism', 'Thus Spake Zarathustra' and 'Doing Without Concepts'

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97 ideas

1. Philosophy / A. Wisdom / 3. Wisdom Deflated
But what is the reasoning of the body, that it requires the wisdom you seek? [Nietzsche]
     Full Idea: There is more reason in your body than in your best wisdom. For who knows for what purpose your body requires precisely your best wisdom?
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.05)
     A reaction: Lovely question. For years I've paid lip-service to wisdom as the rough aim of all philosophy. Not quite knowing what wisdom is doesn't bother me, but knowing why I want wisdom certainly does, especially after this idea.
1. Philosophy / D. Nature of Philosophy / 5. Aims of Philosophy / a. Philosophy as worldly
Philosophy is empty if it does not in some way depend on matters of fact [Machery]
     Full Idea: Save, maybe, for purely formal (e.g. logical) theories, philosophical claims whose correctness does not depend, however indirectly, on matters of fact are empty: they are neither true nor false.
     From: Edouard Machery (Doing Without Concepts [2009], Intro)
     A reaction: I subscribe to this view. I'd even say that logic is empty if it is not answerable to the facts. The facts are nature, so this is a naturalistic manifesto.
1. Philosophy / D. Nature of Philosophy / 8. Humour
Reject wisdom that lacks laughter [Nietzsche]
     Full Idea: Let that wisdom be false to us that brought no laughter with it!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 3.12.23)
3. Truth / A. Truth Problems / 1. Truth
Some truths have true negations [Beall/Restall]
     Full Idea: Dialetheism is the view that some truths have true negations.
     From: JC Beall / G Restall (Logical Pluralism [2006], 7.4)
     A reaction: The important thing to remember is that they are truths. Thus 'Are you feeling happy?' might be answered 'Yes and no'.
3. Truth / A. Truth Problems / 7. Falsehood
To love truth, you must know how to lie [Nietzsche]
     Full Idea: Inability to lie is far from being love of truth. ....He who cannot lie does not know what truth is.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 4.13.9)
3. Truth / B. Truthmakers / 5. What Makes Truths / b. Objects make truths
A truthmaker is an object which entails a sentence [Beall/Restall]
     Full Idea: The truthmaker thesis is that an object is a truthmaker for a sentence if and only if its existence entails the sentence.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.5.3)
     A reaction: The use of the word 'object' here is even odder than usual, and invites many questions. And the 'only if' seems peculiar, since all sorts of things can make a sentence true. 'There is someone in the house' for example.
4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic
(∀x)(A v B) |- (∀x)A v (∃x)B) is valid in classical logic but invalid intuitionistically [Beall/Restall]
     Full Idea: The inference of 'distribution' (∀x)(A v B) |- (∀x)A v (∃x)B) is valid in classical logic but invalid intuitionistically. It is straightforward to construct a 'stage' at which the LHS is true but the RHS is not.
     From: JC Beall / G Restall (Logical Pluralism [2006], 6.1.2)
     A reaction: This seems to parallel the iterative notion in set theory, that you must construct your hierarchy. All part of the general 'constructivist' approach to things. Is some kind of mad platonism the only alternative?
4. Formal Logic / E. Nonclassical Logics / 5. Relevant Logic
Excluded middle must be true for some situation, not for all situations [Beall/Restall]
     Full Idea: Relevant logic endorses excluded middle, ..but says instances of the law may fail. Bv¬B is true in every situation that settles the matter of B. It is necessary that there is some such situation.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.2)
     A reaction: See next idea for the unusual view of necessity on which this rests. It seems easier to assert something about all situations than just about 'some' situation.
It's 'relevantly' valid if all those situations make it true [Beall/Restall]
     Full Idea: The argument from P to A is 'relevantly' valid if and only if, for every situation in which each premise in P is true, so is A.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.2)
     A reaction: I like the idea that proper inference should have an element of relevance to it. A falsehood may allow all sorts of things, without actually implying them. 'Situations' sound promising here.
Relevant logic does not abandon classical logic [Beall/Restall]
     Full Idea: We have not abandoned classical logic in our acceptance of relevant logic.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.4)
     A reaction: It appears that classical logic is straightforwardly accepted, but there is a difference of opinion over when it is applicable.
Relevant consequence says invalidity is the conclusion not being 'in' the premises [Beall/Restall]
     Full Idea: Relevant consequence says the conclusion of a relevantly invalid argument is not 'carried in' the premises - it does not follow from the premises.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.3.3)
     A reaction: I find this appealing. It need not invalidate classical logic. It is just a tougher criterion which is introduced when you want to do 'proper' reasoning, instead of just playing games with formal systems.
A doesn't imply A - that would be circular [Beall/Restall]
     Full Idea: We could reject the inference from A to itself (on grounds of circularity).
     From: JC Beall / G Restall (Logical Pluralism [2006], 8)
     A reaction: [Martin-Meyer System] 'It's raining today'. 'Are you implying that it is raining today?' 'No, I'm SAYING it's raining today'. Logicians don't seem to understand the word 'implication'. Logic should capture how we reason. Nice proposal.
Relevant logic may reject transitivity [Beall/Restall]
     Full Idea: Some relevant logics reject transitivity, but we defend the classical view.
     From: JC Beall / G Restall (Logical Pluralism [2006], 8)
     A reaction: [they cite Neil Tennant for this view] To reject transitivity (A?B ? B?C ? A?C) certainly seems a long way from classical logic. But in everyday inference Tennant's idea seems good. The first premise may be irrelevant to the final conclusion.
4. Formal Logic / E. Nonclassical Logics / 6. Free Logic
Free logic terms aren't existential; classical is non-empty, with referring names [Beall/Restall]
     Full Idea: A logic is 'free' to the degree it refrains from existential import of its singular and general terms. Classical logic must have non-empty domain, and each name must denote in the domain.
     From: JC Beall / G Restall (Logical Pluralism [2006], 7.1)
     A reaction: My intuition is that logic should have no ontology at all, so I like the sound of 'free' logic. We can't say 'Pegasus does not exist', and then reason about Pegasus just like any other horse.
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
Logic studies consequence; logical truths are consequences of everything, or nothing [Beall/Restall]
     Full Idea: Nowadays we think of the consequence relation itself as the primary subject of logic, and view logical truths as degenerate instances of this relation. Logical truths follow from any set of assumptions, or from no assumptions at all.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.2)
     A reaction: This seems exactly right; the alternative is the study of necessities, but that may not involve logic.
Syllogisms are only logic when they use variables, and not concrete terms [Beall/Restall]
     Full Idea: According to the Peripatetics (Aristotelians), only syllogistic laws stated in variables belong to logic, and not their applications to concrete terms.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.5)
     A reaction: [from Lukasiewicz] Seems wrong. I take it there are logical relations between concrete things, and the variables are merely used to describe these relations. Variables lack the internal powers to drive logical necessities. Variables lack essence!
5. Theory of Logic / A. Overview of Logic / 2. History of Logic
The view of logic as knowing a body of truths looks out-of-date [Beall/Restall]
     Full Idea: Through much of the 20th century the conception of logic was inherited from Frege and Russell, as knowledge of a body of logical truths, as arithmetic or geometry was a knowledge of truths. This is odd, and a historical anomaly.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.2)
     A reaction: Interesting. I have always taken this idea to be false. I presume logic has minimal subject matter and truths, and preferably none at all.
5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
Logic studies arguments, not formal languages; this involves interpretations [Beall/Restall]
     Full Idea: Logic does not study formal languages for their own sake, which is formal grammar. Logic evaluates arguments, and primarily considers formal languages as interpreted.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.1)
     A reaction: Hodges seems to think logic just studies formal languages. The current idea strikes me as a much more sensible view.
5. Theory of Logic / A. Overview of Logic / 8. Logic of Mathematics
The model theory of classical predicate logic is mathematics [Beall/Restall]
     Full Idea: The model theory of classical predicate logic is mathematics if anything is.
     From: JC Beall / G Restall (Logical Pluralism [2006], 4.2.1)
     A reaction: This is an interesting contrast to the claim of logicism, that mathematics reduces to logic. This idea explains why students of logic are surprised to find themselves involved in mathematics.
5. Theory of Logic / B. Logical Consequence / 2. Types of Consequence
There are several different consequence relations [Beall/Restall]
     Full Idea: We are pluralists about logical consequence because we take there to be a number of different consequence relations, each reflecting different precisifications of the pre-theoretic notion of deductive logical consequence.
     From: JC Beall / G Restall (Logical Pluralism [2006], 8)
     A reaction: I don't see how you avoid the slippery slope that leads to daft logical rules like Prior's 'tonk' (from which you can infer anything you like). I say that nature imposes logical conquence on us - but don't ask me to prove it.
5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=
A sentence follows from others if they always model it [Beall/Restall]
     Full Idea: The sentence X follows logically from the sentences of the class K if and only if every model of the class K is also a model of the sentence X.
     From: JC Beall / G Restall (Logical Pluralism [2006], 3.2)
     A reaction: This why the symbol |= is often referred to as 'models'.
5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth
Logical truth is much more important if mathematics rests on it, as logicism claims [Beall/Restall]
     Full Idea: If mathematical truth reduces to logical truth then it is important what counts as logically true, …but if logicism is not a going concern, then the body of purely logical truths will be less interesting.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.2)
     A reaction: Logicism would only be one motivation for pursuing logical truths. Maybe my new 'Necessitism' will derive the Peano Axioms from broad necessary truths, rather than from logic.
5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / d. The Preface paradox
Preface Paradox affirms and denies the conjunction of propositions in the book [Beall/Restall]
     Full Idea: The Paradox of the Preface is an apology, that you are committed to each proposition in the book, but admit that collectively they probably contain a mistake. There is a contradiction, of affirming and denying the conjunction of propositions.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.4)
     A reaction: This seems similar to the Lottery Paradox - its inverse perhaps. Affirm all and then deny one, or deny all and then affirm one?
7. Existence / E. Categories / 1. Categories
Do categories store causal knowledge, or typical properties, or knowledge of individuals? [Machery]
     Full Idea: Psychologists have attempted to determine whether a concept of a category stores some causal knowledge about the members, some knowledge about their typical properties, or some knowledge about specific members.
     From: Edouard Machery (Doing Without Concepts [2009], 1.3.2)
     A reaction: I take there to be a psychological process of 'generalisation', so that knowledge of individuals is not and need not be retained. I am dubious about entities called 'properties', so I will vote for causal (including perceptual) knowledge.
7. Existence / E. Categories / 2. Categorisation
Are quick and slow categorisation the same process, or quite different? [Machery]
     Full Idea: Are categorisation under time pressure and categorisation without time pressure ...two different cognitive competences?
     From: Edouard Machery (Doing Without Concepts [2009], 5.1.1)
     A reaction: This is a psychologist's question. Introspectively, they do seem to be rather different, as there is no time for theorising and explaining when you are just casting your eyes over the landscape.
For each category of objects (such as 'dog') an individual seems to have several concepts [Machery]
     Full Idea: I contend that the best available evidence suggests that for each category of objects an individual typically has several concepts. For instance, instead of having a single concept of dog, an individual has in fact several concepts of dog.
     From: Edouard Machery (Doing Without Concepts [2009], 3)
     A reaction: Machery's book is a sustained defence of this hypothesis, with lots of examples from psychology. Any attempt by philosophers to give a neat and tidy account of categorisation looks doomed.
A thing is classified if its features are likely to be generated by that category's causal laws [Machery]
     Full Idea: A to-be-classified object is considered a category member to the extent that its features were likely to have been generated by the category's causal laws.
     From: Edouard Machery (Doing Without Concepts [2009], 4.4.4)
     A reaction: [from Bob Rehder, psychologist, 2003] This is an account of categorisation which arises from the Theory Theory view of concepts, of which I am a fan. I love this idea, which slots neatly into the account I have been defending. Locke would like this.
7. Existence / E. Categories / 5. Category Anti-Realism
There may be ad hoc categories, such as the things to pack in your suitcase for a trip [Machery]
     Full Idea: There may be ad hoc categories, as when people think about the things to pack in a small suitcase for a trip abroad.
     From: Edouard Machery (Doing Without Concepts [2009], 1.4.1)
     A reaction: This seems to be obviously correct, though critics might say that 'category' is too grand a term for such a grouping.
9. Objects / A. Existence of Objects / 5. Individuation / a. Individuation
There may be several ways to individuate things like concepts [Machery]
     Full Idea: Philosophers have rarely explained why they believe that there is a single correct way of individuating concepts. Many entities can be legitimately individuated in several ways.
     From: Edouard Machery (Doing Without Concepts [2009], 2.1.3)
     A reaction: I cite this under 'individuation' because I think that is a very garbled concept. I agree with this point, even though I don't really know exactly what individuation is supposed to be.
10. Modality / A. Necessity / 3. Types of Necessity
Relevant necessity is always true for some situation (not all situations) [Beall/Restall]
     Full Idea: In relevant logic, the necessary truths are not those which are true in every situation; rather, they are those for which it is necessary that there is a situation making them true.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.2)
     A reaction: This seems to rest on the truthmaker view of such things, which I find quite attractive (despite Merricks's assault). Always ask what is making some truth necessary. This leads you to essences.
14. Science / B. Scientific Theories / 1. Scientific Theory
If a term doesn't pick out a kind, keeping it may block improvements in classification [Machery]
     Full Idea: If a hypothesised natural kind term fails to pick out a natural kind, keeping this theoretical term is likely to prevent the development of a new classification system that would identify the relevant kinds.
     From: Edouard Machery (Doing Without Concepts [2009], 8.2.3)
     A reaction: I'm persuaded. This is why metaphysicians should stop talking about 'properties'.
Vertical arguments say eliminate a term if it picks out different natural kinds in different theories [Machery]
     Full Idea: Vertical arguments for eliminativism of theoretical terms note that distinct types of generalisation do not line up with each other. ...It is argued that the theoretical term picks out more than one natural kind.
     From: Edouard Machery (Doing Without Concepts [2009], 8.2.3)
     A reaction: He mentions 'depression', as behavioural and cognitive; the former includes apes, and the latter doesn't. It is a nice principle for tidying up theories.
Horizontal arguments say eliminate a term if it fails to pick out a natural kind [Machery]
     Full Idea: Horizontal arguments for eliminativism of theoretical terms say that some terms should be eliminated if they do not pick out a natural kind.
     From: Edouard Machery (Doing Without Concepts [2009], 8.2.3)
     A reaction: This is the one Machery likes, but I would say that it is less obvious than the 'vertical' version, since picking out a natural kind may not be the only job of a theoretical term. (p.238: Machery agrees!)
14. Science / C. Induction / 1. Induction
Psychologists use 'induction' as generalising a property from one category to another [Machery]
     Full Idea: Typically, psychologists use 'induction' to refer to the capacity to generalise a property from a category (the source) to another category (the target).
     From: Edouard Machery (Doing Without Concepts [2009], 7.1.1)
     A reaction: This is because psychologists are interested in the ongoing activities of thought. Philosophers step back a bit, to ask how the whole thing could get started. Philosophical induction has to start with individuals and single observations.
'Ampliative' induction infers that all members of a category have a feature found in some of them [Machery]
     Full Idea: Induction is 'ampliative' when it infers that all or most members of a category possess a property from the fact that some of its members have this property.
     From: Edouard Machery (Doing Without Concepts [2009], 7.1.1)
     A reaction: This sounds like a simple step in reasoning, but actually it is more like explanation, and will involve overall coherence and probability, rather than a direct conclusion. This invites sceptical questions. The last one observed may be the exception.
16. Persons / B. Nature of the Self / 7. Self and Body / a. Self needs body
The powerful self behind your thoughts and feelings is your body [Nietzsche]
     Full Idea: Behind your thoughts and feelings stands a powerful commander, an unknown wise man - he is called a self. He lives in your body; he is your body.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], I.4), quoted by Kevin Aho - Existentialism: an introduction 5 'Creature'
     A reaction: I find Nietzsche's view of the self very congenial, though I tend to see the self as certain central functions of the brain. The brain is enmeshed in the body (as in the location of pains).
16. Persons / D. Continuity of the Self / 3. Reference of 'I'
Forget the word 'I'; 'I' is performed by the intelligence of your body [Nietzsche]
     Full Idea: You say 'I' and you are proud of this word. But greater than this - although you will not believe in it - is your body and its great intelligence, which does not say 'I' but performs 'I'.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.05)
     A reaction: I'm not sure if I understand this, but I offer it as a candidate for the most profound idea ever articulated about personal identity.
17. Mind and Body / E. Mind as Physical / 4. Connectionism
Connectionists cannot distinguish concept-memories from their background, or the processes [Machery]
     Full Idea: Connectionists typically do not distinguish between processes and memory stores, and, more importantly, it is unclear whether connectionists can draw a distinction between the knowledge stored in a concept and the background.
     From: Edouard Machery (Doing Without Concepts [2009], 1.1)
     A reaction: In other words connectionism fails to capture the structured nature of our thinking. There is an innate structure (which, say I, should mainly be seen as 'mental files').
18. Thought / A. Modes of Thought / 1. Thought
We can identify a set of cognitive capacities which are 'higher order' [Machery]
     Full Idea: Categorization, deduction, induction, analogy-making, linguistic understanding, and planning - all of these are higher cognitive capacities.
     From: Edouard Machery (Doing Without Concepts [2009], 1.1)
     A reaction: His 'lower' competences are perceptual and motor. I say the entry to the higher competences are abstraction, idealisation and generalisation. If you can't do these (chimpanzees!) you will not be admitted.
18. Thought / A. Modes of Thought / 6. Judgement / a. Nature of Judgement
Judgement is always predicating a property of a subject [Beall/Restall]
     Full Idea: All judgement, for Kant, is essentially the predication of some property to some subject.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.5)
     A reaction: Presumably the denial of a predicate could be a judgement, or the affirmation of ambiguous predicates?
18. Thought / D. Concepts / 1. Concepts / a. Nature of concepts
Concepts for categorisation and for induction may be quite different [Machery]
     Full Idea: In general, concepts that are used when we categorise and concepts that are used when we reason inductively could have little in common.
     From: Edouard Machery (Doing Without Concepts [2009], 3.2.1)
     A reaction: In the end he is going to reject concepts altogether, so he would say this. Friends of concepts would be very surprised if the mind were so uneconomical in its activities, given that induction seems to be up to its neck in categorisation.
Concept theories aim at their knowledge, processes, format, acquisition, and location [Machery]
     Full Idea: A theory of concepts should determine the knowledge stored in them, and the cognitive processes that use concepts. Ideally it should also characterise their format, their acquisition, and (increasingly) localise them in the brain.
     From: Edouard Machery (Doing Without Concepts [2009], 4)
     A reaction: Machery reveals his dubious scientism in the requirement to localise them in the brain. That strikes me as entirely irrelevant to both philosophy and psychology. I want the format, acquisition and knowledge.
We should abandon 'concept', and just use 'prototype', 'exemplar' and 'theory' [Machery]
     Full Idea: The notion of 'concept' ought to be eliminated from the theoretical vocabulary of psychology, and replaced by the notions of prototype, exemplar, and theory.
     From: Edouard Machery (Doing Without Concepts [2009], 8)
     A reaction: Machery's main thesis. I think similarly about 'property' in metaphysics. It embraces different ideas, and if we eliminated 'property' (and used predicate, class, fundamental power, complex power) we would do better. Psychologists have dropped 'memory'.
18. Thought / D. Concepts / 1. Concepts / b. Concepts in philosophy
In the philosophy of psychology, concepts are usually introduced as constituents of thoughts [Machery]
     Full Idea: In the philosophy of psychology, concepts are usually introduced as constituents, components, or parts of thoughts.
     From: Edouard Machery (Doing Without Concepts [2009], 1.4.3)
     A reaction: My instincts are against this. I take the fundamentals of concepts to be mental responses to distinct individual items in the world. Thought builds up from that. He says psychologists themselves don't see it this way. Influence of Frege.
In philosophy theories of concepts explain how our propositional attitudes have content [Machery]
     Full Idea: A philosophical theory of concepts is a semantic theory for our propositional attitudes: it explains how our thoughts can have the content they have.
     From: Edouard Machery (Doing Without Concepts [2009], 2.1.2)
     A reaction: I suppose this is what I am interested in. I want to know in what way concepts form a bridge between content and world. I am more interested in the propositions, and less interested in our attitudes towards them.
18. Thought / D. Concepts / 1. Concepts / c. Concepts in psychology
By 'concept' psychologists mean various sorts of representation or structure [Machery]
     Full Idea: Psychologists use 'concept' interchangeably with 'mental representation', 'category representation', 'knowledge representation', 'knowledge structure', 'semantic representation', and 'conceptual structures'.
     From: Edouard Machery (Doing Without Concepts [2009], 1.1)
     A reaction: [Machery gives references for each of these] Machery is moving in to attack these, but we look to psychologists to give some sort of account of what a concept might consist of, such that it could be implemented by neurons.
Concept theorists examine their knowledge, format, processes, acquisition and location [Machery]
     Full Idea: Psychological theories of concepts try to describe the knowledge stored in concepts, the format of concepts, the cognitive processes that use the concepts, the acquisition of concepts, and the localization of concepts in the brain.
     From: Edouard Machery (Doing Without Concepts [2009], Intro)
     A reaction: I suppose it would the first two that are of central interest. What individuates a concept (its 'format') and what are the contents of a concept. The word 'stored' seems to imply a mental files view.
Psychologists treat concepts as long-term knowledge bodies which lead to judgements [Machery]
     Full Idea: In psychology, concepts are characterized as those bodies of knowledge that are stored in long-term memory and used most higher cognitive competences when these processes result in judgements.
     From: Edouard Machery (Doing Without Concepts [2009], Intro)
     A reaction: Machery mounts an attack on this idea. I like the 'mental files' idea, where a concept starts as a label, and then acquires core knowledge, and then further information. The 'concept' is probably no more than a label, and minimal starter information.
Psychologist treat concepts as categories [Machery]
     Full Idea: Psychologists often use 'concept' and 'category' interchangeably.
     From: Edouard Machery (Doing Without Concepts [2009], 1.1)
     A reaction: Well they shouldn't. Some concepts are no more than words, and don't categorise anything. Some things may be categorised by a complex set of concepts.
18. Thought / D. Concepts / 2. Origin of Concepts / c. Nativist concepts
The concepts OBJECT or AGENT may be innate [Machery]
     Full Idea: Several concepts, such as OBJECT or AGENT, may be innate.
     From: Edouard Machery (Doing Without Concepts [2009], 4.1.4)
     A reaction: It is one thing to say that we respond to objects and agents, and another to say that we have those 'concepts'. Presumably birds, and even bees, have to relate to similar features. Add PROCESS?
18. Thought / D. Concepts / 4. Structure of Concepts / a. Conceptual structure
Concepts should contain working memory, not long-term, because they control behaviour [Machery]
     Full Idea: We ought to reserve the term 'concept' for the bodies of knowledge in working memory, and not for our knowledge of long-term memory, because the former, and not the latter, 'control behaviour'.
     From: Edouard Machery (Doing Without Concepts [2009], 1.4.1)
     A reaction: [He cites the psychologist Barsalou 1993] Some more theoretical concepts can only be recalled with difficulty, and control our theorising rather than our behaviour. But we act on some theories, so there is no clear borderline.
One hybrid theory combines a core definition with a prototype for identification [Machery]
     Full Idea: One hybrid theory of concepts says they have both a core and an identification procedure. The core is a definition (necessary and sufficient conditions), while the identification procedure consists of a prototype (the properties typical of a category).
     From: Edouard Machery (Doing Without Concepts [2009], 3.3.1)
     A reaction: This combines the classical and prototype theories of concepts. I like it because it fits the idea of 'mental files' nicely (see Recanati). If concepts are files (as in a database) they will have aspects like labels, basic info, and further details.
Heterogeneous concepts might have conflicting judgements, where hybrid theories will not [Machery]
     Full Idea: The Heterogeneity Hypothesis, but not the hybrid theory of concepts, predicts that the coreferential bodies of knowledge it posits will occasionally lead to conflicting outcomes, such as inconsistent judgements.
     From: Edouard Machery (Doing Without Concepts [2009], 3.3.2)
     A reaction: Machery's book champions the Heterogeneous Hypothesis. Hybrid views say the aspects of a concept are integrated, but Heterogeneity says there are separate processes. My preferred 'file' approach would favour integration.
Concepts as definitions was rejected, and concepts as prototypes, exemplars or theories proposed [Machery]
     Full Idea: Since the rejection of the classical theory of concepts (that they are definitions), three paradigms have successively emerged in the psychology of concepts: the prototype paradigm, the exemplar paradigm, and the theory paradigm.
     From: Edouard Machery (Doing Without Concepts [2009], 4)
     A reaction: I am becoming a fan of the 'theory theory' proposal, because the concepts centre around what explains the phenomenon, which fits my explanatory account of essentialism. Not that it's right because it agrees with me, of course.....
18. Thought / D. Concepts / 4. Structure of Concepts / b. Analysis of concepts
The concepts for a class typically include prototypes, and exemplars, and theories [Machery]
     Full Idea: Across domains (such as biology and psychology) classes of physical objects, substances and events are typically represented by a prototype, by a set of exemplars, and by a theory.
     From: Edouard Machery (Doing Without Concepts [2009], 3.2.3)
     A reaction: In other words he thinks that all of the major psychological theories of concepts are partially correct, and he argues for extensive pluralism in the true picture. Bad news for neat philosophy, but real life is a right old mess.
18. Thought / D. Concepts / 4. Structure of Concepts / c. Classical concepts
Classical theory can't explain facts like typical examples being categorised quicker [Machery]
     Full Idea: The nail in the coffin of the classical theory is its lack of explanatory power. For example it doesn't explain the fact that typical x's are categorised more quickly and more reliably than atypical x's.
     From: Edouard Machery (Doing Without Concepts [2009], 4.1.3)
     A reaction: [He cites Rosch and Mervis: 1975:ch 5] This research launched the 'prototype' theory, which has since been challenged by the 'exemplar' and 'theory theory' rivals (and neo-empiricism, and idealisation).
Many categories don't seem to have a definition [Machery]
     Full Idea: For many categories there is simply no definition to learn (such as Wittgenstein's example of a 'game').
     From: Edouard Machery (Doing Without Concepts [2009], 4.1.4)
Classical theory implies variety in processing times, but this does not generally occur [Machery]
     Full Idea: If a concept is defined by means of another, such as MURDER by means of KILL, then processing the former concept should take longer in the classical theory, but several experiments show that this is not the case.
     From: Edouard Machery (Doing Without Concepts [2009], 4.1.3)
     A reaction: For the philosopher there is no escaping the findings of neuroscience when it comes to the study of concepts. This invites the question of the role, if any, of philosophy. I take philosophy to concern the big picture, or it is nothing.
18. Thought / D. Concepts / 4. Structure of Concepts / d. Concepts as prototypes
Knowing typical properties of things is especially useful in induction [Machery]
     Full Idea: Knowing which properties are typical of a class is particularly useful when you have to draw inductions about the members of a class.
     From: Edouard Machery (Doing Without Concepts [2009], 4.2.1)
The term 'prototype' is used for both typical category members, and the representation [Machery]
     Full Idea: The term 'prototype' is used ambiguously to designate the most typical members of a category, and the representation of a category. (I use the term in the second sense).
     From: Edouard Machery (Doing Without Concepts [2009], 4.2.1 n25)
Prototype theories are based on computation of similarities with the prototype [Machery]
     Full Idea: The most important property of prototype theories is that cognitive processes are assumed to involve the computation of the similarity between prototypes and other representations.
     From: Edouard Machery (Doing Without Concepts [2009], 4.2.3)
     A reaction: [He cites J.A.Hampton 1998, 2006] This presumably suits theories of the mind as largely computational (e.g. Fodor's account, based on the Turing machine).
Prototype theorists don't tell us how we select the appropriate prototype [Machery]
     Full Idea: We are typically not told how prototypes are selected, that is, what determines whether a specific prototype is retrieved from memory in order to be involved in the categorisation process.
     From: Edouard Machery (Doing Without Concepts [2009], 4.2.4)
     A reaction: One of the aims of this database is to make people aware of ideas that people have already thought of. This one was spotted 2,400 years ago. It's the Third Man problem. How do you even start to think about a particular thing?
Maybe concepts are not the typical properties, but the ideal properties [Machery]
     Full Idea: Barsalou (1983,1985) introduced the idea of ideals instead of prototypes. An ideal is a body of knowledge about the properties a thing should possess (rather than its typical actual properties). ... A 'bully' might be perfect, rather than typical.
     From: Edouard Machery (Doing Without Concepts [2009], 4.5.3)
     A reaction: [compressed] Machery offers this as an interesting minor variant, with little experimental support. I take idealisation to be one of the three key mental operations that enable us to think about the world (along with abstraction and generalisation).
It is more efficient to remember the prototype, than repeatedly create it from exemplars [Machery]
     Full Idea: Instead of regularly producing a prototype out of the exemplars stored in long-term memory, it seems more efficient to extract a prototype from category members during concept learning and to use this prototype when needed.
     From: Edouard Machery (Doing Without Concepts [2009], 6.3.2)
     A reaction: [This is a critique of Barsalou's on-the-fly proposal for prototypes] If the exemplar theory is right, then some sort of summary must occur when faced with a new instance. So this thought favours prototypes against exemplars.
The prototype view predicts that typical members are easier to categorise [Machery]
     Full Idea: The prototype paradigm of concepts makes the strong prediction that typical members should be easier to categorise than atypical members.
     From: Edouard Machery (Doing Without Concepts [2009], 6.4.1)
     A reaction: This is why philosophers should approach the topic of concepts with caution. Clearly empirical testing is going to settle this matter, not abstract theorising.
18. Thought / D. Concepts / 4. Structure of Concepts / e. Concepts from exemplars
Concepts as exemplars are based on the knowledge of properties of each particular [Machery]
     Full Idea: The exemplar paradigm of concepts is built around the idea that concepts are sets of exemplars. In turn, an exemplar is a body of knowledge about the properties believed to be possessed by a particular member of a class.
     From: Edouard Machery (Doing Without Concepts [2009], 4.3.1)
     A reaction: I like the fact that this theory is rooted in particulars, where the prototype theory doesn't seem to say much about how prototypes are derived. But you have to do more than just contemplate a bunch of exemplars.
Exemplar theories need to explain how the relevant properties are selected from a multitude of them [Machery]
     Full Idea: Exemplar theories have a selection problem. Given that individuals have an infinite number of properties, they need to explain why exemplars represent such and such properties, instead of others.
     From: Edouard Machery (Doing Without Concepts [2009], 4.3.1)
     A reaction: I have the impression that this idea rests on the 'abundant' view of properties - that every true predicate embodies a property. A sparse view of properties might give a particular quite a restricted set of properties.
In practice, known examples take priority over the rest of the set of exemplars [Machery]
     Full Idea: An object that is extremely similar to a specific known category member, but only moderately similar to others, is more likely to be categorised as a category member than an object that is moderately similar to most known category members.
     From: Edouard Machery (Doing Without Concepts [2009], 4.3.3)
     A reaction: This research finding is a problem for the Exemplar Theory, in which all the exemplars have equal status. It is even a problem for the Prototype Theory, since the known member may not be like the prototype.
18. Thought / D. Concepts / 4. Structure of Concepts / f. Theory theory of concepts
Theory Theory says category concepts are knowledge stores explaining membership [Machery]
     Full Idea: According to theory theorists, a concept of a category stores some knowledge that can explain the properties of the category members.
     From: Edouard Machery (Doing Without Concepts [2009], 4.4.1)
     A reaction: This is the account of essentialism which I defended in my PhD thesis. So naturally I embrace a theory of the nature of concepts which precisely dovetails with my view. I take explanation to be the central concept in metaphysics.
Theory Theory says concepts are explanatory knowledge, and concepts form domains [Machery]
     Full Idea: The two core ideas of the Theory Theory are that concepts are bodies of knowledge that underlie explanation, where explanation rests on folk examples, and concepts are organised in domains which use similar knowledge.
     From: Edouard Machery (Doing Without Concepts [2009], 4.4.1)
     A reaction: Folk explanation is opposed to scientific explanation, as expounded by Hempel etc. This sounds better and better, since the domains reflect the structure of reality. Machery defends Theory Theory as part of the right answer, but it's my favourite bit.
Theory theorists rely on best explanation, rather than on similarities [Machery]
     Full Idea: Theory theorists deny that categorisation depends on similarity; they often propose that categorisation involves some kind of inference to the best explanation.
     From: Edouard Machery (Doing Without Concepts [2009], 6.5.1)
     A reaction: Love it. Any theory of concepts should, in my view, be continuous with a plausible account of animal minds, and best explanations are not their strong suit. Maybe its explanations for slow categorising, and something else when it's quick.
If categorisation is not by similarity, it seems to rely on what properties things might have [Machery]
     Full Idea: It seems that when subjects are not categorising by similarity, they are relying on what properties objects can and cannot have - that is, on some modal knowledge.
     From: Edouard Machery (Doing Without Concepts [2009], 6.5.1)
     A reaction: I would call this essentialist categorisation, based on the inner causal powers which generate the modal profile of the thing. We categorise bullets and nails very differently, because of their modal profiles.
The theory account is sometimes labelled as 'knowledge' or 'explanation' in approach [Machery]
     Full Idea: The theory paradigm is sometimes called 'the knowledge approach' (Murphy 2002) or 'explanation-based views' (Komatsu 1992).
     From: Edouard Machery (Doing Without Concepts [2009], 4)
     A reaction: The word 'explanation' is music to my ears, so I am immediately sympathetic to the theory theory of concepts, even if it falls at the final hurdle.
18. Thought / D. Concepts / 5. Concepts and Language / a. Concepts and language
The word 'grandmother' may be two concepts, with a prototype and a definition [Machery]
     Full Idea: If a prototype of grandmothers represents them as grey-haired old women, and a definition of grandmothers represents them as being necessarily the mother of a parent ....we may fail to recognise that 'grandmother' represents two distinct concepts.
     From: Edouard Machery (Doing Without Concepts [2009], 3.3.4)
     A reaction: He is referring to two distinct theories about what a concept is. He argues that both theories apply, so words do indeed represent several different concepts. Nice example.
18. Thought / D. Concepts / 5. Concepts and Language / b. Concepts are linguistic
For behaviourists concepts are dispositions to link category members to names [Machery]
     Full Idea: Behaviourists identified concepts with a mere disposition to associate category members with a given name.
     From: Edouard Machery (Doing Without Concepts [2009], 4.1.1)
     A reaction: This is one reason why the word 'disposition' triggers alarm bells in the immediately post-behaviourist generation of philosophers. The proposal is far too linguistic in character.
19. Language / B. Reference / 3. Direct Reference / b. Causal reference
Americans are more inclined to refer causally than the Chinese are [Machery]
     Full Idea: Tests suggest that American subjects were significantly more likely than Chinese subjects to have intuitions in line with causal-historical theories of reference.
     From: Edouard Machery (Doing Without Concepts [2009], 8.1.3)
     A reaction: This is an example of 'experimental philosophy' in action (of which Machery is a champion). The underlying idea is that Americans are generally more disposed to think causally than the Chinese are. So more scientific? What do the Hopi do?
19. Language / C. Assigning Meanings / 8. Possible Worlds Semantics
We can rest truth-conditions on situations, rather than on possible worlds [Beall/Restall]
     Full Idea: Situation semantics is a variation of the truth-conditional approach, taking the salient unit of analysis not to be the possible world, or some complete consistent index, but rather the more modest 'situation'.
     From: JC Beall / G Restall (Logical Pluralism [2006], 5.5.4)
     A reaction: When I read Davidson (and implicitly Frege) this is what I always assumed was meant. The idea that worlds are meant has crept in to give truth conditions for modal statements. Hence situation semantics must cover modality.
19. Language / D. Propositions / 1. Propositions
Propositions commit to content, and not to any way of spelling it out [Beall/Restall]
     Full Idea: Our talk of propositions expresses commitment to the general notion of content, without a commitment to any particular way of spelling this out.
     From: JC Beall / G Restall (Logical Pluralism [2006], 2.1)
     A reaction: As a fan of propositions I like this. It leaves open the question of whether the content belongs to the mind or the language. Animals entertain propositions, say I.
20. Action / B. Preliminaries of Action / 2. Willed Action / a. Will to Act
The will is constantly frustrated by the past [Nietzsche]
     Full Idea: Powerless against that which has been done, the will is an angry spectator of all things past. The will cannot will backwards; that it cannot break time and time's desire - that is the will's most lonely affliction.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 2.20)
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / d. Biological ethics
We created meanings, to maintain ourselves [Nietzsche]
     Full Idea: Man first implanted values into things to maintain himself - he first created the meaning of things, a human meaning!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.16)
     A reaction: It is certainly hard to see anything resembling values or meaning in the cosmos, if you remove the human beings. We should expect an evolutionary grounding in their explanation.
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / f. Übermensch
The noble man wants new virtues; the good man preserves what is old [Nietzsche]
     Full Idea: The noble man wants to create new things and a new virtue. The good man wants the old things and that the old things shall be preserved.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.09)
     A reaction: There is a limit to how many plausible virtues the noble men can come up with. We may already have run out. Are we going to have to re-run the Iliad?
22. Metaethics / B. Value / 2. Values / g. Love
We only really love children and work [Nietzsche]
     Full Idea: One loves from the very heart only one's child and one's work.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 3.03)
     A reaction: Very Nietzchean (and masculine?) to cite one's work. Rachmaninov said he was 85% musician and 15% human being, so I guess he loved music from the very heart.
22. Metaethics / C. The Good / 2. Happiness / c. Value of happiness
I want my work, not happiness! [Nietzsche]
     Full Idea: Do I aspire after happiness? I aspire after my work!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 4.20)
     A reaction: I empathise with aspiring to do something, rather than be something. But what do we wish for our children? Happiness first, then achievement?
23. Ethics / C. Virtue Theory / 3. Virtues / a. Virtues
Virtues can destroy one another, through jealousy [Nietzsche]
     Full Idea: Every virtue is jealous of the others, and jealousy is a terrible thing. Even virtues can be destroyed through jealousy.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.07)
     A reaction: How much more subtle and plausible than the picture of accumulating virtues, like medals! Zarathustra says it is best to have just one virtue.
23. Ethics / C. Virtue Theory / 4. External Goods / c. Wealth
People now find both wealth and poverty too much of a burden [Nietzsche]
     Full Idea: Nobody grows rich or poor any more: both are too much of a burden.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.01)
     A reaction: True. Most people I know are just puzzled by people who actually seem to want to be extremely wealthy.
23. Ethics / C. Virtue Theory / 4. External Goods / d. Friendship
If you want friends, you must be a fighter [Nietzsche]
     Full Idea: If you want a friend, you must be willing to wage war for him: and to wage war, you must be capable of being an enemy.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.15)
23. Ethics / F. Existentialism / 2. Nihilism
The greatest experience possible is contempt for your own happiness, reason and virtue [Nietzsche]
     Full Idea: What is the greatest thing you can experience? It is the hour of the great contempt. The hour in which even your happiness grows loathsome to you, and your reason and your virtue also.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.01)
     A reaction: This would be a transient state for Nietzsche, in which you realise the hollowness of those traditional ideas, and begin to seek something else.
24. Political Theory / A. Basis of a State / 1. A People / c. A unified people
An enduring people needs its own individual values [Nietzsche]
     Full Idea: No people could live without evaluating; but if it wishes to maintain itself it must not evaluate as its neighbour evaluates.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.16)
     A reaction: Political philosophers say plenty about a 'people', but little about what unifies them, or about what keeps one people distinct from another. Most people's are proud of their local values.
24. Political Theory / B. Nature of a State / 3. Constitutions
The state coldly claims that it is the people, but that is a lie [Nietzsche]
     Full Idea: The state is the coldest of all cold monsters. Coldly it lies, too; and this lie creeps from its mouth: 'I, the state, am the people'. It is a lie!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.12)
     A reaction: This strikes me as just as true even after everyone gets the vote. Rulers can't help gradually forgetting about the people.
25. Social Practice / A. Freedoms / 5. Freedom of lifestyle
Saints want to live as they desire, or not to live at all [Nietzsche]
     Full Idea: 'To live as I desire to live or not to live at all': that is what I want, that is what the most saintly man wants.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 4.09)
     A reaction: [spoken by Zarathustra]
25. Social Practice / D. Justice / 3. Punishment / b. Retribution for crime
Whenever we have seen suffering, we have wanted the revenge of punishment [Nietzsche]
     Full Idea: The spirit of revenge: my friends, that, up to now, has been mankind's chief concern; and where there was suffering, there was always supposed to be punishment.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 2.20)
25. Social Practice / F. Life Issues / 5. Sexual Morality
Man and woman are deeply strange to one another! [Nietzsche]
     Full Idea: Who has fully conceived how strange man and woman are to one another!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 3.10.2)
26. Natural Theory / B. Natural Kinds / 1. Natural Kinds
Artifacts can be natural kinds, when they are the object of historical enquiry [Machery]
     Full Idea: Some artifacts are the objects of inquiry in the social sciences ...such as prehistoric tools ...and hence, artifacts are bona fide natural kinds.
     From: Edouard Machery (Doing Without Concepts [2009], 8.2.1)
     A reaction: Presumably if a bird's nest can be a natural kind, then so can a flint axe, but then so can a mobile phone, for an urban anthropologist. 'Natural' is, to put it mildly, a tricky word.
28. God / A. Divine Nature / 2. Divine Nature
I can only believe in a God who can dance [Nietzsche]
     Full Idea: I should believe only in a God who understood how to dance.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.08)
28. God / C. Attitudes to God / 5. Atheism
Not being a god is insupportable, so there are no gods! [Nietzsche]
     Full Idea: If there were gods, how could I endure not to be a god! Therefore there are no gods. ...For what would there to be create if gods - existed!
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 2.02)
     A reaction: [Zarathustra says this, not Nietzsche!]
29. Religion / D. Religious Issues / 2. Immortality / d. Heaven
Heaven was invented by the sick and the dying [Nietzsche]
     Full Idea: It was the sick and dying who despised the body and the earth and invented the things of heaven and the redeeming drops of blood.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 1.04)
We don't want heaven; now that we are men, we want the kingdom of earth [Nietzsche]
     Full Idea: We certainly do not want to enter into the kingdom of heaven: we have become men, so we want the kingdom of earth.
     From: Friedrich Nietzsche (Thus Spake Zarathustra [1884], 4.18.2)