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Ideas for 'poems', 'Substitutional Classes and Relations' and 'Vagueness'

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2 ideas

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

21602

Many-valued logics don't solve vagueness; its presence at the meta-level is ignored [Williamson]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility

18130

Axiom of Reducibility: there is always a function of the lowest possible order in a given level [Russell, by Bostock]