system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is ignorance of the law not an excuse if you have to go to school for years just to understand the law?
gpt
If ignorance of the law was a defense, it would mean that a prosecutor would not only have to prove a criminal violation but *also* prove the suspect knew it was a criminal violation.  Everyone should know that murder is illegal, but imagine trying to prove that someone *knew* murder is illegal.  Barring getting them to confess they knew, it would be nearly impossible.