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.

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.