Combining Texts

All the ideas for 'Aristotle and Descartes on Matter', 'Epistemic Two-Dimensional Semantics' and 'Letter Seven'

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4 ideas

3. Truth / D. Coherence Truth / 1. Coherence Truth
14713 Truth in a scenario is the negation in that scenario being a priori incoherent [Chalmers]
     Full Idea: The epistemic 1-intension for a sentence S is True at a scenario W iff (W and not-S) is a priori incoherent.
     From: David J.Chalmers (Epistemic Two-Dimensional Semantics [2004], p.180-4), quoted by Laura Schroeter - Two-Dimensional Semantics
     A reaction: See Two-Dimensional Semantics (in 'Language') and Chalmers for the background to this idea. I love the coherence view of justification, but get a bit nervous when people start defining truth in that way.
12. Knowledge Sources / A. A Priori Knowledge / 4. A Priori as Necessities
14712 A sentence is a priori if no possible way the world might actually be could make it false [Chalmers]
     Full Idea: The Core Thesis for rationalist 2D semantics is that for any sentence S, S is apriori iff S has a necessary 1-intension. (That is, there is no possible way the world might be that, if it actually obtained, would make S false).
     From: David J.Chalmers (Epistemic Two-Dimensional Semantics [2004], p.165), quoted by Laura Schroeter - Two-Dimensional Semantics 2.3.2
     A reaction: [The parenthesis is by Schroeter] A '1-intension' is defined by a diagonal on a 2D semantic matrix. Chalmers defends conceivability as the guide to possibility. This is a very traditional view of the a priori, expressed in modern terms.
22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / a. Preconditions for ethics
168 To understand morality requires a soul [Plato]
     Full Idea: Good and evil are meaningless to things that have no soul.
     From: Plato (Letter Seven [c.352 BCE], 334)
     A reaction: That is presumably psuché, and hence includes plants. Soulless things can still function well, but obviously that is not 'meaningful' to them.
26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / b. Prime matter
19399 Prime matter is nothing when it is at rest [Leibniz]
     Full Idea: Primary matter is nothing if considered at rest.
     From: Gottfried Leibniz (Aristotle and Descartes on Matter [1671], p.90)
     A reaction: This goes with Leibniz's Idea 13393, that activity is the hallmark of existence. No one seems to have been able to make good sense of prime matter, and it plays little role in Aristotle's writings.