prosfilaes
Adventurer
I've lost count of the number of times a player has tried to correct me about some rule, and been flat wrong because things were not what the player thought they were.
Good; that means the player is paying attention to what's going on and is using their knowledge of their world to discover that things aren't as they seem to be. I hate when I assume that something was an error on the part of the DM or author, and then discover that it was actually a subtle clue.