Ignorantia legis neminem excusat

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Ignorantia legis neminem excusat. Ignorance of fact may excuse, but not ignorance of law. 4 Bouv. Inst. n. 3828.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Ignorantia juris non excusat - Latin for ignorance of law excuses no one.
Being a student of Political Science and law, having an engineering educational background, I have always read in various books of law and environment regarding the civilized nations of the world who firmly believe that "ignorance of the law does not excuse" or "ignorance of the law excuses no one" (Latin for it is: Ignorantia juris non excusat or ignorantia legis neminem excusat) and also that Eco is the core of sustainable living" but it is otherwise in Pakistan.
According to Burney, ignorantia juris non excusat, not even for teens.