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Ideas for 'works', 'Which Logic is the Right Logic?' and 'Some Puzzles of Ground'

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2 ideas

5. Theory of Logic / E. Structures of Logic / 1. Logical Form

4730	For Aristotle, the subject-predicate structure of Greek reflected a substance-accident structure of reality [Aristotle, by O'Grady]
	Full Idea: Aristotle apparently believed that the subject-predicate structure of Greek reflected the substance-accident nature of reality.
	From: report of Aristotle (works [c.330 BCE]) by Paul O'Grady - Relativism Ch.4
	A reaction: We need not assume that Aristotle is wrong. It is a chicken-and-egg. There is something obvious about subject-predicate language, if one assumes that unified objects are part of nature, and not just conventional.

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / b. Basic connectives

10762	In sentential logic there is a simple proof that all truth functions can be reduced to 'not' and 'and' [Tharp]
	Full Idea: In sentential logic there is a simple proof that all truth functions, of any number of arguments, are definable from (say) 'not' and 'and'.
	From: Leslie H. Tharp (Which Logic is the Right Logic? [1975], §0)
	A reaction: The point of 'say' is that it can be got down to two connectives, and these are just the usual preferred pair.