Flamestrike
Legend
At least that's how I view it.
I view the two as being separate. Your character doesn't realise 'Well the DM told the guy playing me I have no chance of missing this attack, so I cant miss' for example, and they dont realise 'the monster has lots of HP and hasnt been hit yet, so the 1d8 damage from my sword attack cant possibly kill it'.
Its expressly meta-game knowledge.
Put yourself in the shoes of your PC, as if he were a real person, and not in a game.