Ideas.

So I'm at my brothers house and were watching a show... And there was a spirit that showed up (in the show obviously) and he Goes "THAT DOESN'T EEN LOOK REAL!" So I go "how would you know?" And he goes "I'VE SEEN ONE!"... How do you tell a person you think they're bullshitting you? I've had this question for a long time and it's bothered me forever... Life is full of people that do say things to sound cool and idiots who believe that their way is the only way... So my question is, how do you tell somebody that they're bullshitting you?