Selling, logical progression of moves, moving to get into position for your opponent to hit a move on you, etc.... If I watch a wrestler and don't think to myself that "this doesn't make sense" or "why would he do that" then they are logical.
How far does logical go though? Shouldn't most offensive moves actually finish someone? Where each promotion can essentially establish the rules of their own universe it would seem to take away quite a bit to only buy what's logical. Shouldn't every wrestler roll away from an opponent coming off the top? Once there are certain standards or "laws" with consequences then it would seem at that point we can react to occurrences in the ring that prove consistent or not. Sometimes those inconsistencies make for tremendous moments, such as kicking out of something near the finish that has previously been the death knell, or can be problematic where it happens too early.
It just seems if we're really being logical then every match should end pretty quickly and just about everything a wrestler does is illogical. Once he's taken any sustained punishment, how is he alive, much less able to mount a fiery comeback? Enjoy it!
It doesn't have to be MMA, it just has to make sense within the context of wrestling. An irish whip is completely fine.