While you guys are congratulating yourselves for ridiculing another new poster, I'd like to offer a scenario where a hook outside the mouth but in the jaw is possible.

Before I started toothpicking my spinning drift bobber to the line to hold it in place, the little whirly gig would float up the line and the steelhead would take it. You set the hook and the hook is outside the mouth. Fish took the "bait" but is hooked outside the mouth. Fair hook? Absolutely. Aleviated by pinning your birdy drifter to the hook, but still a valid method for taking steelhead in its day.

I've also seen the video from Charlie White where the salmon crashes through the bait tail slapping the baitfish to stun it, then turns around and picks up the limpers. If he tailslaps a hook and gets buttoned, it is still a snag and the fish goes back, even though he intended to hurt it and then eat it. He never got to the eatin part.

Flame away.