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Ideas for 'fragments/reports', 'Axiomatic Theories of Truth (2005 ver)' and 'The Metaphysics of Modality'

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2 ideas

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)

5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic

15651	Instead of saying x has a property, we can say a formula is true of x - as long as we have 'true' [Halbach]
	Full Idea: Quantification over (certain) properties can be mimicked in a language with a truth predicate by quantifying over formulas. Instead of saying that Tom has the property of being a poor philosopher, we can say 'x is a poor philosopher' is true of Tom.
	From: Volker Halbach (Axiomatic Theories of Truth (2005 ver) [2005], 1.1)
	A reaction: I love this, and think it is very important. He talks of 'mimicking' properties, but I see it as philosophers mistakenly attributing properties, when actually what they were doing is asserting truths involving certain predicates.