Combining Texts

Ideas for 'works', 'Introduction to the Theory of Logic' and 'Morality and the emotions'

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 / 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

10896	Propositional logic just needs ¬, and one of ∧, ∨ and → [Zalabardo]
	Full Idea: In propositional logic, any set containing ¬ and at least one of ∧, ∨ and → is expressively complete.
	From: José L. Zalabardo (Introduction to the Theory of Logic [2000], §2.8)