Combining Texts

All the ideas for 'The Sign of Four', 'Conditionals' and 'The Foundations of Mathematics (2nd ed)'

expand these ideas     |    start again     |     specify just one area for these texts

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3 ideas

8. Modes of Existence / A. Relations / 4. Formal Relations / b. Equivalence relation

18465

An 'equivalence' relation is one which is reflexive, symmetric and transitive [Kunen]

10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals

14289

There are some assertable conditionals one would reject if one learned the antecedent [Jackson, by Edgington]

14. Science / C. Induction / 1. Induction

22200

If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle]