4 ideas
| 9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
| Full Idea: Logic is part of a normative theory of thinking, not a substitute for thinking. | |
| From: Ian Rumfitt (The Logic of Boundaryless Concepts [2007], p.13) | |
| A reaction: There is some sort of logicians' dream, going back to Leibniz, of a reasoning engine, which accepts propositions and outputs inferences. I agree with this idea. People who excel at logic are often, it seems to me, modest at philosophy. |
| 9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
| Full Idea: Vagueness in respect of membership is consistency with determinacy of the set's identity, so long as a set's identity is taken to consist, not in its having such-and-such members, but in its being the extension of a concept. | |
| From: Ian Rumfitt (The Logic of Boundaryless Concepts [2007], p.5) | |
| A reaction: I find this view of sets much more appealing than the one that identifies a set with its members. The empty set is less of a problem, as well as non-existents. Logicians prefer the extensional view because it is tidy. |
| 3460 | Superactors and superspartans count against behaviourism [Putnam, by Searle] |
| Full Idea: Putnam proposed the superactor/superspartan objection to behaviourism. | |
| From: report of Hilary Putnam (Brains and Behaviour [1963]) by John Searle - The Rediscovery of the Mind Ch. 2.II | |
| A reaction: This is a beautiful compression of the obvious counterexamples, which are behaviour-wth-no-experience, and experience-with-no-behaviour. Presumably, though, Spartans are disposed to go 'aagh!' when they get home, and there are no 'super' actors. |
| 7101 | Virtue theory needs an external standard to judge behaviour and character [Inwagen, by Statman] |
| Full Idea: Virtue theory leaves out something essential, namely, the existence of a standard of behaviour which is prior to and independent of human character, in terms of which we evaluate the behaviour and character of ourselves and others. | |
| From: report of Peter van Inwagen (Response to Slote [1990]) by Daniel Statman - Introduction to Virtue Ethics §5 | |
| A reaction: This sounds very like Moore's Naturalistic Fallacy. Personally I prefer Aristotle's naturalistic reliance on human nature and function to Moore's totally unjustified intuitionist Platonism. How can anything be good if it isn't supposed to do anything? |