3 ms·

A classical method is to derive a contradiction from the converse.

• EGreg 9y ago
  Please elaborate
  • andrewaylett 9y ago
    Basically just https://en.wikipedia.org/wiki/Proof_by_contradiction https://en.wikipedia.org/wiki/Proof_by_contradiction
    • EGreg 9y ago
      I mean about the converse. Why does it work?
      • qntty 9y ago
        [Proof by contradiction doesn't have anything to do with the converse of a statement as andrewaylett incorrectly stated and EGreg is being a little bit difficult here.]