Combining Texts

Ideas for 'Frege philosophy of mathematics', 'The Principles of Science' and 'The Nature of Mathematics'

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2 ideas

2. Reason / B. Laws of Thought / 3. Non-Contradiction

14787

Self-contradiction doesn't reveal impossibility; it is inductive impossibility which reveals self-contradiction [Peirce]

2. Reason / D. Definition / 7. Contextual Definition

9847	A contextual definition permits the elimination of the expression by a substitution [Dummett]