Pedantic, but it’s not illegal to not know the law; it’s just not an excuse if you violate it. It’s also practically impossible for a human to know the law, but

Pedantic, but it’s not illegal to not know the law; it’s just not an excuse if you violate it. It’s also practically impossible for a human to know the law, but it’s also practically impossible to arrest everybody, so best bet is to just go full lemming and do whatever you see everybody else doing. Digression: I just thought of a fictional justice system for a fantasy/sci-fi novel. There are no laws, but 1% of the country is incarcerated at all times. A prosecutor bringing trial against a defendant must find someone currently in jail, and a trial is conducted where a jury votes on which to send to jail, and which to free.