Combining Texts

Ideas for 'The Fixation of Belief', 'Laudatio: Prof Ruth Barcan Marcus' and 'The Principles of Mathematics'

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2 ideas

5. Theory of Logic / B. Logical Consequence / 8. Material Implication

14106

Implication cannot be defined [Russell]

14108

It would be circular to use 'if' and 'then' to define material implication [Russell]