Combining Texts

Ideas for 'The Logic of Boundaryless Concepts', 'The Analysis of Matter' and 'The Metaphysics of Modality'

unexpand these ideas     |    start again     |     choose another area for these texts

display all the ideas for this combination of texts

---

2 ideas

5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

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.

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / d. and

12010	Is the meaning of 'and' given by its truth table, or by its introduction and elimination rules? [Forbes,G]
	Full Idea: The typical semantic account of validity for propositional connectives like 'and' presupposes that meaning is given by truth-tables. On the natural deduction view, the meaning of 'and' is given by its introduction and elimination rules.
	From: Graeme Forbes (The Metaphysics of Modality [1985], 4.4)