And that's not what I said. People are assuming the scenario is a guy LUNGING at a cop with a knife. I didn't say that. It's escalation if you can't prove the mens rea of the man with the knife, that he was absolutely, unequivocally about to use to it do harm. That's why brandishing a deadly weapon =/= attempted murder. Murder requires proof of intent.
Doesn't matter if he lunges at the cop, if the man pulls out the knife, is within a reasonable distance, and verbally threatens to use the knife on the officer then the officer is not at fault for using lethal force.
Dude, you keep moving the goalposts.