Combining Texts

Ideas for 'works', 'On Interpretation' and 'Reflections on Knowledge, Truth and Ideas'

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3 ideas

5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence

21593	In talking of future sea-fights, Aristotle rejects bivalence [Aristotle, by Williamson]
	Full Idea: Unlike Aristotle, Stoics did not reject Bivalence for future contingencies; it is true or false that there will be a sea-fight tomorrow.
	From: report of Aristotle (On Interpretation [c.330 BCE], 19a31) by Timothy Williamson - Vagueness 1.2
	A reaction: I'd never quite registered this simple account of the sea-fight. As Williamson emphasises, one should not lightly reject the principle of bivalence. Has Aristotle entered a slippery slope? Stoics disagreed with Aristotle.

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

1701	A prayer is a sentence which is neither true nor false [Aristotle]
	Full Idea: A prayer is a sentence which is neither true nor false.
	From: Aristotle (On Interpretation [c.330 BCE], 17a01)

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.