Originally Posted by
Crichton
Being able to apply logic like that isn't metagaming, you're right. But applying your OOC knowledge of a creature's AC, especially if that character hasn't encountered that exact creature before, very much is.
And while I don't necessarily subscribe to it, many DMs and players are of the opinion that there's a strong difference between 'that was a good swing and it hit' and 'you hit on a 15 and I missed on a 13, so we can determine its AC is between 14 and 15, which means I can use my lower bonus attack and still have a good chance to hit' Many would see the latter as absolutely metagaming. Characters don't know the numbers of the dice roll, and they don't know the numbers of their own attack bonus. They probably do know 'this attack hits harder but is harder to land hits with' though. It's all grey area, really.