20 ideas
7910 | Pursue truth with the urgency of someone whose clothes are on fire [Ashvaghosha] |
Full Idea: As though your turban or your clothes were on fire, so with a sense of urgency should you apply your intellect to the comprehension of the truths. | |
From: Ashvaghosha (Saundaranandakavya [c.50], XVI) | |
A reaction: The best philosophers need no such urging. I retain a romantic view that we should be 'natural' in these things. See Plato's views in Idea 2153 and 1638. However, maybe I should be confronted with this quotation every morning when I awake. |
18767 | Free logics has terms that do not designate real things, and even empty domains [Anderson,CA] |
Full Idea: Free logics say 1) singular terms are allowed that do not designate anything that exists; sometimes 2) is added: the domain of discourse is allowed to be empty. Logics with both conditions are called 'universally free logics'. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.3) | |
A reaction: I really like the sound of this, and aim to investigate it. Karel Lambert's writings are the starting point. Maybe the domain of logic is our concepts, rather than things in the world, in which case free logic sounds fine. |
18763 | Basic variables in second-order logic are taken to range over subsets of the individuals [Anderson,CA] |
Full Idea: Under its now standard principal interpretation, the monadic predicate variables in second-order logic range over subsets of the domain on individuals. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 1.5) | |
A reaction: This is an interpretation in which properties are just sets of things, which is fine if you are a logician, but not if you want to talk about anything important. Still, we must play the game. Boolos introduced plural quantification at this point. |
18771 | Stop calling ∃ the 'existential' quantifier, read it as 'there is...', and range over all entities [Anderson,CA] |
Full Idea: Ontological quantifiers might just as well range over all the entities needed for the semantics. ...The minimal way would be to just stop calling '∃' an 'existential quantifier', and always read it as 'there is...' rather than 'there exists...'. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.6) | |
A reaction: There is no right answer here, but it seems to be the strategy adopted by most logicians, and the majority of modern metaphysicians. They just allow abstracta, and even fictions, to 'exist', while not being fussy what it means. Big mistake! |
18769 | Do mathematicians use 'existence' differently when they say some entity exists? [Anderson,CA] |
Full Idea: A cursory examination shows that mathematicians have no aversion to saying that this-or-that mathematical entity exists. But is this a different sense of 'existence'? | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.6) | |
A reaction: For those of us like me and my pal Quine who say that 'exist' is univocal (i.e. only one meaning), this is a nice challenge. Quine solves it by saying maths concerns sets of objects. I, who don't like sets, am puzzled (so I turn to fictionalism...). |
18770 | We can distinguish 'ontological' from 'existential' commitment, for different kinds of being [Anderson,CA] |
Full Idea: There are sensible ways to maike a distinction between different kinds of being. ..One need not fear that this leads to a 'bloated ontology'. ...We need only distinguish 'ontological commitment' from 'existential commitment' | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.6) | |
A reaction: He speaks of giving fictional and abstract entities a 'lower score' in existence. I think he means the 'ontological' commitment to be the stronger of the two. |
18766 | 's is non-existent' cannot be said if 's' does not designate [Anderson,CA] |
Full Idea: The paradox of negative existentials says that if 's' does not designate something, then the sentence 's is non-existent' is untrue. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.1) | |
A reaction: This only seems be a problem for logicians. Everyone else can happily say 'my coffee is non-existent'. |
18768 | We cannot pick out a thing and deny its existence, but we can say a concept doesn't correspond [Anderson,CA] |
Full Idea: Parmenides was correct - one cannot speak of that which is not, even to say that it is not. But one can speak of concepts and say of them that they do not correspond to anything real. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 2.5) | |
A reaction: [This summarises Alonso Church, who was developing Frege] This sounds like the right thing to say about non-existence, but then the same principle must apply to assertions of existence, which will also be about concepts and not things. |
18765 | Individuation was a problem for medievals, then Leibniz, then Frege, then Wittgenstein (somewhat) [Anderson,CA] |
Full Idea: The medieval philosophers and then Leibniz were keen on finding 'principles of individuation', and the idea appears again in Frege, to be taken up in some respects by Wittgenstein. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 1.6) | |
A reaction: I take a rather empirical approach to this supposed problem, and suggest we break 'individuation' down into its component parts, and then just drop the word. Discussions of principles of individuations strike me as muddled. Wiggins and Lowe today. |
16065 | Constitution is identity (being in the same place), or it isn't (having different possibilities) [Wasserman] |
Full Idea: Some insist that constitution is identity, on the grounds that distinct material objects cannot occupy the same place at the same time. Others argue that constitution is not identity, since the statue and its material differ in important respects. | |
From: Ryan Wasserman (Material Constitution [2009], Intro) | |
A reaction: The 'important respects' seem to concern possibilities rather than actualities, which is suspicious. It is misleading to think we are dealing with two things and their relation here. Objects must have constitutions; constitutions make objects. |
16067 | Constitution is not identity, because it is an asymmetric dependence relation [Wasserman] |
Full Idea: For those for whom 'constitution is not identity' (the 'constitution view'), constitution is said to be an asymmetric relation, and also a dependence relation (unlike identity). | |
From: Ryan Wasserman (Material Constitution [2009], 2) | |
A reaction: It seems obvious that constitution is not identity, because there is more to a thing's identity than its mere constitution. But this idea makes it sound as if constitution has nothing to do with identity (chalk and cheese), and that can't be right. |
16069 | There are three main objections to seeing constitution as different from identity [Wasserman] |
Full Idea: The three most common objections to the constitution view are the Impenetrability Objection (two things in one place?), the Extensionality Objection (mereology says wholes are just their parts), and the Grounding Objection (their ground is the same). | |
From: Ryan Wasserman (Material Constitution [2009], 2) | |
A reaction: [summary] He adds a fourth, that if two things can be in one place, why stop at two? [Among defenders of the Constitution View he lists Baker, Fine, Forbes, Koslicki, Kripke, Lowe, Oderberg, N.Salmon, Shoemaker, Simons and Yablo.] |
16068 | The weight of a wall is not the weight of its parts, since that would involve double-counting [Wasserman] |
Full Idea: We do not calculate the weight of something by summing the weights of all its parts - weigh bricks and the molecules of a wall and you will get the wrong result, since you have weighed some parts more than once. | |
From: Ryan Wasserman (Material Constitution [2009], 2) | |
A reaction: In fact the complete inventory of the parts of a thing is irrelevant to almost anything we would like to know about the thing. The parts must be counted at some 'level' of division into parts. An element can belong to many different sets. |
16074 | Relative identity may reject transitivity, but that suggests that it isn't about 'identity' [Wasserman] |
Full Idea: If the relative identity theorist denies transitivity (to deal with the Ship of Theseus, for example), this would make us suspect that relativised identity relations are not identity relations, since transitivity seems central to identity. | |
From: Ryan Wasserman (Material Constitution [2009], 6) | |
A reaction: The problem here, I think, focuses on the meaning of the word 'same'. One change of plank leaves you with the same ship, but that is not transitive. If 'identical' is too pure to give the meaning of 'the same' it's not much use in discussing the world. |
18764 | The notion of 'property' is unclear for a logical version of the Identity of Indiscernibles [Anderson,CA] |
Full Idea: In the Identity of Indiscernibles, one speaks about properties, and the notion of a property is by no means clearly fixed and formalized in modern symbolic logic. | |
From: C. Anthony Anderson (Identity and Existence in Logic [2014], 1.5) | |
A reaction: The unclarity of 'property' is a bee in my philosophical bonnet, in speech, and in metaphysics, as well as in logic. It may well be the central problem in our attempts to understand the world in general terms. He cites intensional logic as promising. |
7906 | When the Buddha reached the highest level of insight, he could detect no self in the world [Ashvaghosha] |
Full Idea: The great Buddha passed through the eight stages of Transic insight, and quickly reached their highest point. From the summit of the world downwards he could detect no self anywhere. | |
From: Ashvaghosha (Buddhacarita [c.50], XIV) | |
A reaction: In the manner of Nietzsche, I am inclined to say that they find what they want to find, because that is their value. They want to get rid of the self, and dream of a mode in which existence continues without it. Is Buddhism opposed to human life? |
7904 | The first stage of trance is calm amidst applied and discursive thinking [Ashvaghosha] |
Full Idea: The first stage of trance is calm amidst applied and discursive thinking. | |
From: Ashvaghosha (Buddhacarita [c.50], V.11) | |
A reaction: Personally I am not sure that I would want to go any further that the first stage, since the elimination of discursive thinking seems to me to be approaching death. To pursue intense thinking very calmly I take to be the ideal of all western philosophers. |
7905 | The Buddha sought ultimate reality and the final goal of existence in his meditations [Ashvaghosha] |
Full Idea: Next the Boddhisatva, possessed of great skill in Transic meditation, put himself into a trance, intent on discerning both the ultimate reality of things and the final goal of existence. | |
From: Ashvaghosha (Buddhacarita [c.50], XIV.2) | |
A reaction: The ontological and teleological goals of the Buddha were identical to the goals of the ancient Greek philosophers, and even we have teleological aims in our study of evolution. I would expect better results from the western approach. |
7909 | The Eightfold Path concerns morality, wisdom, and tranquillity [Ashvaghosha] |
Full Idea: The Eightfold Path has three steps concerning morality - right speech, right bodily action, and right livelihood; three of wisdom - right views, right intentions, and right effort; and two of tranquillity - right mindfulness and right concentration. | |
From: Ashvaghosha (Saundaranandakavya [c.50], XVI) | |
A reaction: Most of this translates quite comfortably into the aspirations of western philosophy. For example, 'right effort' sounds like Kant's claim that only a good will is truly good (Idea 3710). The Buddhist division is interesting for action theory. |
7908 | At the end of a saint, he is not located in space, but just ceases to be disturbed [Ashvaghosha] |
Full Idea: When an accomplished saint comes to the end, he does not go anywhere down in the earth or up in the sky, nor into any of the directions of space, but because his defilements have become extinct he simply ceases to be disturbed. | |
From: Ashvaghosha (Saundaranandakavya [c.50], XVI) | |
A reaction: To 'cease to be disturbed' is the most attractive account of heaven I have encountered. It all sounds a bit dull though. I wonder, as usual, how they know all this stuff. |