@Cryptonic , you do realize, that if he were sheriff, he would have known from his rolecard that detection immune scum exist, which should have propelled him to actually read the setup to see what the scumteam is made of. But since he didn't even know there was one scum, he shouldn't have had sheriff as a rolecard. Hence, if you're in a world where he is only sheriff or scum, you should conclude he's scum.