3 ideas
| 15390 | Metaphysics attempts to give an account of everything, in terms of categories and principles [Simons] |
| Full Idea: Metaphysics, the noblest of philosophic enterprises, is an attempt to give an account of everything. ...Its job is to provide a universal framework (of categories and principles) within which anything whatever can take its place. | |
| From: Peter Simons (Whitehead: process and cosmology [2009], 'Speculative') | |
| A reaction: Bravo! I take metaphysics to be entirely continuous with science, but operating entirely at the highest level of generality. See Westerhoff on categories, though. The enterprise may not be going too well. |
| 19347 | Substance needs independence, unity, and stability (for individuation); also it is a subject, for predicates [Perkins] |
| Full Idea: For individuation, substance needs three properties: independence, to separate it from other things; unity, to call it one thing, rather than an aggregate; and permanence or stability over time. Its other role is as subject for predicates. | |
| From: Franklin Perkins (Leibniz: Guide for the Perplexed [2007], 3.1) | |
| A reaction: Perkins is describing the Aristotelian view, which is taken up by Leibniz. 'Substance' is not a controversial idea, if we see that it only means that the world is full of 'things'. It is an unusual philosopher wholly totally denies that. |
| 7803 | Modal logic began with translation difficulties for 'If...then' [Lewis,CI, by Girle] |
| Full Idea: C.I.Lewis began his groundbreaking work in modal logic because he was concerned about the unreliability of the material conditional as a translation of 'If ... then' conditionals. | |
| From: report of C.I. Lewis (Symbolic Logic (with Langford) [1932]) by Rod Girle - Modal Logics and Philosophy 12.3 | |
| A reaction: Compare 'if this is square then it has four corners' with 'if it rains then our afternoon is ruined'. Different modalities seem to be involved. We even find that 'a square has four corners' will be materially implied if it rains! |