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5784
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In its primary and formal sense, 'true' applies to propositions, not beliefs [Russell]
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Full Idea:
We call a belief true when it is belief in a true proposition, ..but it is to propositions that the primary formal meanings of 'truth' and 'falsehood' apply.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §IV)
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A reaction:
I think this is wrong. A proposition such as 'it is raining' would need a date-and-time stamp to be a candidate for truth, and an indexical statement such as 'I am ill' would need to be asserted by a person. Of course, books can contain unread truths.
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5783
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Propositions of existence, generalities, disjunctions and hypotheticals make correspondence tricky [Russell]
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Full Idea:
The correspondence of proposition and fact grows increasingly complicated as we pass to more complicated types of propositions: existence-propositions, general propositions, disjunctive and hypothetical propositions, and so on.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §IV)
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A reaction:
An important point. Truth must not just work for 'it is raining', but also for maths, logic, tautologies, laws etc. This is why so many modern philosophers have retreated to deflationary and minimal accounts of truth, which will cover all cases.
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8476
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Axiomatization simply picks from among the true sentences a few to play a special role [Orenstein]
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Full Idea:
In axiomatizing, we are merely sorting out among the truths of a science those which will play a special role, namely, serve as axioms from which we derive the others. The sentences are already true in a non-conventional or ordinary sense.
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From:
Alex Orenstein (W.V. Quine [2002], Ch.5)
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A reaction:
If you were starting from scratch, as Euclidean geometers may have felt they were doing, you might want to decide which are the simplest truths. Axiomatizing an established system is a more advanced activity.
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8452
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Traditionally, universal sentences had existential import, but were later treated as conditional claims [Orenstein]
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Full Idea:
In traditional logic from Aristotle to Kant, universal sentences have existential import, but Brentano and Boole construed them as universal conditionals (such as 'for anything, if it is a man, then it is mortal').
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From:
Alex Orenstein (W.V. Quine [2002], Ch.2)
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A reaction:
I am sympathetic to the idea that even the 'existential' quantifier should be treated as conditional, or fictional. Modern Christians may well routinely quantify over angels, without actually being committed to them.
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8473
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The logicists held that is-a-member-of is a logical constant, making set theory part of logic [Orenstein]
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Full Idea:
The question to be posed is whether is-a-member-of should be considered a logical constant, that is, does logic include set theory. Frege, Russell and Whitehead held that it did.
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From:
Alex Orenstein (W.V. Quine [2002], Ch.5)
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A reaction:
This is obviously the key element in the logicist programme. The objection seems to be that while first-order logic is consistent and complete, set theory is not at all like that, and so is part of a different world.
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16051
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Life has a new supervenient relation, which alters its underlying physical events [Morgan,L]
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Full Idea:
When some new kind of relatedness is supervenient (say at the level of life), the way in which the physical events which are involved run their course is different in virtue of its presence.
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From:
Lloyd Morgan (Emergent Evolution [1923], pp.15-16), quoted by Terence Horgan - From Supervenience to Superdupervenience 1
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A reaction:
This is a clear assertion of 'downward causation' at the first introduction of 'supervenience', supporting 'emergentism' about life and mind. That is, the newly-emerged feature has new causal powers that affect the physical system from outside. Wrong!
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8458
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Just individuals in Nominalism; add sets for Extensionalism; add properties, concepts etc for Intensionalism [Orenstein]
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Full Idea:
Modest ontologies are Nominalism (Goodman), admitting only concrete individuals; and Extensionalism (Quine/Davidson) which admits individuals and sets; but Intensionalists (Frege/Carnap/Church/Marcus/Kripke) may have propositions, properties, concepts.
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From:
Alex Orenstein (W.V. Quine [2002], Ch.3)
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A reaction:
I don't like sets, because of Idea 7035. Even the ontology of individuals could collapse dramatically (see the ideas of Merricks, e.g. 6124). The intensional items may be real enough, but needn't have a place at the ontological high table.
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5780
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The three questions about belief are its contents, its success, and its character [Russell]
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Full Idea:
There are three issues about belief: 1) the content which is believed, 2) the relation of the content to its 'objective' - the fact which makes it true or false, and 3) the element which is belief, as opposed to consideration or doubt or desire.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §III)
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A reaction:
The correct answers to the questions (trust me) are that propositions are the contents, the relation aimed at is truth, which is a 'metaphysical ideal' of correspondence to facts, and belief itself is an indefinable feeling. See Hume, Idea 2208.
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5778
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If we object to all data which is 'introspective' we will cease to believe in toothaches [Russell]
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Full Idea:
If privacy is the main objection to introspective data, we shall have to include among such data all sensations; a toothache, for example, is essentially private; a dentist may see the bad condition of your tooth, but does not feel your ache.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §II)
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A reaction:
Russell was perhaps the first to see why eliminative behaviourism is a non-starter as a theory of mind. Mental states are clearly a cause of behaviour, so they can't be the same thing. We might 'eliminate' mental states by reducing them, though.
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8471
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Three ways for 'Socrates is human' to be true are nominalist, platonist, or Montague's way [Orenstein]
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Full Idea:
'Socrates is human' is true if 1) subject referent is identical with a predicate referent (Nominalism), 2) subject reference member of the predicate set, or the subject has that property (Platonism), 3) predicate set a member of the subject set (Montague)
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From:
Alex Orenstein (W.V. Quine [2002], Ch.3)
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A reaction:
Orenstein offers these as alternatives to Quine's 'inscrutability of reference' thesis, which makes the sense unanalysable.
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5781
|
Our important beliefs all, if put into words, take the form of propositions [Russell]
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Full Idea:
The important beliefs, even if they are not the only ones, are those which, if rendered into explicit words, take the form of a proposition.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §III)
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A reaction:
This assertion is close to the heart of the twentieth century linking of ontology and epistemology to language. It is open to challenges. Why is non-propositional belief unimportant? Do dogs have important beliefs? Can propositions exist non-verbally?
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5782
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A proposition expressed in words is a 'word-proposition', and one of images an 'image-proposition' [Russell]
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Full Idea:
I shall distinguish a proposition expressed in words as a 'word-proposition', and one consisting of images as an 'image-proposition'.
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From:
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §III)
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A reaction:
This, I think, is good, though it raises the question of what exactly an 'image' is when it is non-visual, as when a dog believes its owner called. This distinction prevents us from regarding all knowledge and ontology as verbal in form.
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