contary to popular belief a 'dead herring' referes to the case in which all the answer exhibited in a multichoise questions do not satisfy the criteria to corrispond to the question. this is normally done by a teacher that is identified by the name anti-haasskett or a binary opposed haaasskkket.
"WTF THIS MUTLI CHOISE IS A DEAD HERRING" "you are correct the premise of the question is invalid." HOW IS NONE THE ANSWER. and so on.