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Ideas for 'works', 'My Philosophical Development' and 'The Foundations of Mathematics (2nd ed)'

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3 ideas

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

10121

Contradiction is not a sign of falsity, nor lack of contradiction a sign of truth [Pascal]

5. Theory of Logic / E. Structures of Logic / 1. Logical Form

7528	Leibniz bases everything on subject/predicate and substance/property propositions [Russell]

5. Theory of Logic / F. Referring in Logic / 1. Naming / e. Empty names

6439	Names are meaningless unless there is an object which they designate [Russell]