In law, ignorantia juris non excusat (Latin for "ignorance of the law excuses not"),[1] or ignorantia legis neminem excusat ("ignorance of law excuses no one"),[2] 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 f
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