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Combining Philosophers
Ideas for Stilpo, Gottlob Frege and Keith Devlin
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2 ideas
9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects
9891
The first demand of logic is of a sharp boundary
[Frege]
9388
Every concept must have a sharp boundary; we cannot allow an indeterminate third case
[Frege]