Ignorance of the law

Nature

In law, ignorantia juris non excusat (Latin for "ignorance of the law excuses not"), or ignorantia legis neminem excusat ("ignorance of law excuses no one"), is a legal principle holding that a person who is unaware of a law may not escape liability for violating that law merely by being unaware of its content.

European-law countries with a tradition of Roman law may also use an expression from Aristotle translated into Latin: nemo censetur ignorare legem ("nobody is thought to be ignorant of the law") or ignorantia iuris nocet ("not knowing the law is harmful").

Source: Wikipedia

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(F) Fuzzy exceptional problems