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Ideas for 'The Fixation of Belief', 'Logic in Mathematics' and 'works'

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2 ideas

9. Objects / A. Existence of Objects / 4. Impossible objects

15783

Definite descriptions can't unambiguously pick out an object which doesn't exist [Lycan on Quine]

9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects

9388	Every concept must have a sharp boundary; we cannot allow an indeterminate third case [Frege]