Ignorantia facti excusat

Ignorantia facti excusat, ignorantia juris non excusat. Ignorance of facts excuses, ignorance of law does not excuse. 1 Co. 177; 4 Bouv. Inst. n 3828. See Ignorance.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.