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Ideas for 'works', 'Axiomatic Theories of Truth' and 'Metaphysics: the logical approach'

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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 / 8. Theories in Logic

16310	A theory is some formulae and all of their consequences [Halbach]
	Full Idea: A theory is a set of formulae closed under first-order logical consequence.
	From: Volker Halbach (Axiomatic Theories of Truth [2011], 5.1)