A man walks into a bar, orders his beer, flips his coaster over to the blank side and gets out a pen.
He asks the bartender, “Do you agree that this is a coaster?”
The bartender replies, “Yes.”
The man draws a house on the coaster and asks, “Do you agree that this is a house?”
The bartender, confused by the line of questioning, replies hesitantly as he serves the man his beer, “Yes…”
The man places the beer on the coaster with the house drawing and asks his final question, “Do you agree this beer is on the house?”
The bartender, now growing impatient, snaps, “Of course it is, what’s with all of these non-sensical questions?!”
The man raises his glass and exclaims, “I love this bar! Cheers!”