Legal Question in Criminal Law in Illinois

While each is a "plea", "Et hoc . . . " is an old form (Latin) used primarily in civil cases where the party is saying there is something I would testify to that could seemingly go against me but in reality is a kind of defense, so it usually went at the end of other responsive pleadings. Today we might consider this an "affirmative defense" that says something like "so what if . . . it still doesn't matter". On the other hand, "nolo" is an actual plea that says "I give up but don't want to say anything" and usually is used in a criminal case to say "ok find me guilty but I'm not really prepared to admit to anything". Hope this helps.