PROOF, in Lat. and Logic, is that degree of evidence which carries conviction to the mind. It differs from demonstration, which is applicable only to those truths of which the contrary is inconceivable. It differs likewise from probability, which produces for the most part nothing more than opinion, while proof produces belief. See PROBABILITY.
The proof of crimes was anciently effected among our ancestors divers ways; viz. by duel or combat, fire, water, &c. See DUEL and ORDEAL.