ignorance of the law is no excuse for breaking it

used to imply that being unaware of a law does not excuse someone from being punished for breaking it

The principle "ignorance of the law is no excuse" has been a longstanding legal concept, and is rooted in various historical and philosophical traditions, including ancient Roman law. It reflects the idea that individuals are expected to be aware of the laws that govern them and that ignorance cannot be used as a defense. The proverb serves as a reminder that responsibility and accountability are important, regardless of one's knowledge or understanding of the law.