Combining Texts

Ideas for 'Phenomenalism', 'The Principles of Mathematics' and 'Summa Theologicae'

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3 ideas

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

23173

If a syllogism admits one absurdity, others must follow [Aquinas]

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]