Closed bets, closed minds

"Oh, sure! According to you, there is no such a thing as a royal flush! Everyone who ever had one was either a liar or a madman, right?"

"This is your last warning: show-your-cards."

"Whose idea was it to bring the ufologist again?"

Poker

"Reason and experience indicate that one of the players holds the winning hand. You posit that I might not be that player, but it is equally true that I might be that player indeed, and if we stop and consider the attributes such a hand would ideally have..."

"Put your cards on the table already!"

"This is the last time ever we invite a theologian over to play."