You've missed the point (of the knife?): I was referring to this (from Wikipedia and other sources):
Less than convincing attempts to read historical significance into the words[5] has led to the speculation that this musical round was written earlier and refers to Queen Mary I of England blinding and executing three Protestant bishops[6] (History tells us that Ridley, Latimer and Cranmer were burned at the stake, not blinded[7]). The earliest lyrics do not talk about directly killing the three blind mice and are dated after Queen Mary died, however, "she scrapte her tripe licke thou the knife" implies they were prepared and consumed if not a reference to tasting the blood of a slain adversary