It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, At the Platinum Sanctuary, the twins are greeted by Highbearer Vord. He offers to seal Opash's book in a vault beneath the city, but you, who doesn't entirely trust him, tells him they didn't actually bring it with them.
DM: No, because Imposter is the ability to mimic somebody else. It has nothing to do-- A disguise kit is what you're using.
Player: And I've always had a disguise kit.
DM: Correct.
Player: Because I did something back in the home game, I did something.
DM: Yeah, you've done a couple of things. But it's not an ability you have.
Player: No?
DM: Well, you do have an ability, but it's only for you, it's not for Doty.
