Sorry for the confusion. I'm not talking about my butts. They aren't rancid. They're at 165 right now and smell amazing. They stunk when I popped the seal, but that's not abnormal for butts that come out of a cryovac.
I'm just talking in theory about a rancid piece of meat. Let's just say it has mold growing on it, is black and gray in spots and has been sitting in the sun for a week.
I'm having a hard time understanding if "safety" is always achieved at 200F, or if there are organisms that can survive.