Re: It is only sometimes a defense
"Which is of course why it's so important that ignorance of the law should never be considered a defence."
I'll try to remember that when they outlaw walking on the cracks in the pavement having hidden the notice in a locked filing cabinet somewhere dark, with a purring creature ready to rip your throat out should you ever decide to go look.
It should always be *considered*, just not necessarily with much weight attributed to it (unless circumstances decide that it should).