Combining Texts

Ideas for 'fragments/reports', 'Are Persons Bodies?' and 'The Ways of Paradox'

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7 ideas

5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens

8078	Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]

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

6023	Every proposition is either true or false [Chrysippus, by Cicero]

5. Theory of Logic / L. Paradox / 3. Antinomies

21691

Antinomies contradict accepted ways of reasoning, and demand revisions [Quine]

5. Theory of Logic / L. Paradox / 4. Paradoxes in Logic / a. Achilles paradox

21690

Whenever the pursuer reaches the spot where the pursuer has been, the pursued has moved on [Quine]

5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / d. Russell's paradox

21689

A barber shaves only those who do not shave themselves. So does he shave himself? [Quine]

21694

Membership conditions which involve membership and non-membership are paradoxical [Quine]

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / a. The Liar paradox

21692

If we write it as '"this sentence is false" is false', there is no paradox [Quine]