Combining Texts

Ideas for 'In Defense of Essentialism', 'Posterior Analytics' and 'On What There Is'

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8 ideas

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

12376

Demonstrations by reductio assume excluded middle [Aristotle]

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

12373

Something holds universally when it is proved of an arbitrary and primitive case [Aristotle]

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

12363

Everything is either asserted or denied truly [Aristotle]

5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic

1618	We study bound variables not to know reality, but to know what reality language asserts [Quine]

5. Theory of Logic / F. Referring in Logic / 1. Naming / f. Names eliminated

8455	Canonical notation needs quantification, variables and predicates, but not names [Quine, by Orenstein]

8456	Quine extended Russell's defining away of definite descriptions, to also define away names [Quine, by Orenstein]

5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions

1611	Names can be converted to descriptions, and Russell showed how to eliminate those [Quine]

5. Theory of Logic / K. Features of Logics / 1. Axiomatisation

13004

Aristotle's axioms (unlike Euclid's) are assumptions awaiting proof [Aristotle, by Leibniz]