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Glam Journal

What is the ignorance defense?

Author

Andrew Henderson

Updated on March 21, 2026

What is the ignorance defense?

Ignorantia juris non excusat or ignorantia legis neminem excusat (Latin for “ignorance of the law excuses not” and “ignorance of law excuses no one” respectively) 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.

Is ignorance of the law ever a legal excuse?

In general, ignorance or mistake about the existence or application of legislation creating an offence is no excuse. The second provision simply reiterates the “truism” that a defendant’s mistake or ignorance of law might make it impossible for the prosecution to establish fault.

Why isn’t ignorance of the law an excuse?

Essentially, it means that if someone breaks the law, he or she is still liable even if they had no knowledge of the law being broken. Thomas Jefferson said, “Ignorance of the law is no excuse in any country. If it were, the laws would lose their effect, because it can always be pretended.”

Is ignorance a defense against responsibility?

In general, it is no defense to a criminal charge that the accused was unaware that the conduct was criminal. Ignorance or mistake of fact provides a defense to a criminal charge when the mistaken view of the facts is inconsistent with the required criminal purpose.

What is an example of ignorance of the law?

Take, for example, a defendant who knows he is distributing heroin but does not know that heroin is listed on the schedules, 21 CFR §1308.11 (2014). Because ignorance of the law is typically no defense to criminal prosecution, Bryan v. But that is not necessarily true for lesser known drugs.

What does ignorance mean in law?

The want or absence of knowledge. Ignorance of law is want of knowledge or acquaintance with the laws of the land inso far as they apply to the act, relation, duty, or matter under consideration.

What is the saying about ignorance and the law?

An ancient maxim of the law is ignorantia juris non excusat, or ignorance of the law does not excuse. Put another way, it is presumed that the public knows the laws, and a defense of ignorance is typically not allowed.

What is the meaning of ignorance of law?

Ignorance of law means want of knowledge of those laws which a person has a duty to know and which everyman is presumed to know. Ignorance can be voluntary or involuntary. For example ignorance of a law which has not yet been promulgated.

What is an example of ignorance?

Ignorance: Lack of Facts or Awareness. Here are some examples of ignorance: A negative attitude about another race is an example of ignorance. Believing a rumor can be ignorant, like the rumor in the 1960s that Paul McCartney was dead and replaced with someone who looked like him.

What article is ignorance of the law excuses no one?

As the famous legal maxim goes… “Ignorance of the law excuses no one.” Hence, it is highly advisable to get acquainted with the laws and culture of any country that you visit. This famous legal maxim is embodied in Article 42 of Federal Law No.

What are the 3 types of ignorance?

Ignorance can appear in three different types: factual ignorance (absence of knowledge of some fact), object ignorance (unacquaintance with some object), and technical ignorance (absence of knowledge of how to do something).

How does an ignorant person act?

Ignorant, illiterate, unlettered, uneducated mean lacking in knowledge or in training. Ignorant may mean knowing little or nothing, or it may mean uninformed about a particular subject: An ignorant person can be dangerous. I confess I’m ignorant of mathematics.

Who says “ignorance of the law is no excuse”?

Essentially, it means that if someone breaks the law, he or she is still liable even if they had no knowledge of the law being broken. Thomas Jefferson said, “Ignorance of the law is no excuse in any country.

When is ignorance of the law an excuse?

Ignorantia juris non excusat or ignorantia legis neminem excusat (Latin for “ignorance of the law excuses not” and “ignorance of law excuses no one” respectively) is a legal principle holding that a person who is unaware of a law may not escape liability for violating that law merely because one was unaware of its content.

Can ignorance or mistake be a defense to a crime?

Some crimes may set forth that mistake of fact is a defense. Otherwise, if the criminal defendant can prove that the mistake reasonably negated an element of the crime, the defense will usually be held to apply and absolve the defendant of liability. Ignorance of the law is very rarely a defense.

What is ignorance of law?

Ignorance of law is want of knowledge or acquaintance with the laws of the land in so far as they apply to the act, relation, duty, or matter under consideration. Ignorance of fact is want of knowledge of some fact or facts constituting or relating to the subject matter in hand.