Quote Originally Posted by bekeleven View Post

It's entirely reasonable that both players will be reporting incorrect damage values to their DM in the ensuing combat. If they believe it to be an animal, ranger 1 will be giving incorrectly low damage and ranger 2 incorrectly high. Should the DM correct these damage values for them? Since the damage bonus from ranger 1 comes from knowing how to combat magical beasts so well, it could be argued that they're not using the correct combat techniques and therefore don't gain any damage bonus.
And that's why you always take Nemesis on a ranger if you can ^^ Also, I'm pretty sure that if you've studied extensively one type of creature, you should know when you're fighting one, even if it looks like something else. So the DM should correct you on the damage.