Contra principia negantem non est disputandum

Contra principia negantem non est disputandum (Latin, alternatively Contra principia negantem disputari non potest and Contra principia negantem disputari nequit; literally, "Against one who denies the principles, there can be no debate") is a principle of logic and law: in order to debate reasonably about a disagreement, there must be agreement about the principles or facts by which to judge the arguments. == History == The maxim cannot be found in Aristotle, though scholars have pointed to some Aristotelian passages that approach it in spirit.

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