NO means exactly that.
This infuriates me so much.
After watching the news last night and hearing that the judge in a trial asked the jurors to return a not guilty verdict on the accused because the woman was so pissed is just disgusting.
If the judge was so pissed and woke up to find that he had been , would he be saying the same thing? " i was so drunk that i didn't know what i was doing" i don't think so.