Ignorantia juris non excusat or Ignorantia legis
neminem excusat
(Latin for, "Ignorance
of the law does not excuse," or, "Ignorance
of the law excuses no one.")
- Ignorance of the law excuses no man; not that all men
know the law; but because 'tis an excuse every man will plead, and no man
can tell how to confute him.
- John Selden (1584-1654), posthumously published in
Table Talk, 1689.