A man walks into a bar and the bartender asks, "What'll you have?"

The guy answers, "A scotch, please."

The bartender hands him the drink and says, "That'll be five dollars," to which the man replies, "What are you talking about? I don't owe you anything for this."

A lawyer, sitting nearby and overhearing the conversation, says to the bartender, "You know, he's got you there. In the original offer, which constitutes a binding contract upon acceptance, there was no stipulation of remuneration."

The bartender's not impressed, but says to the guy, "Okay, you beat me for a drink, but don't ever let me catch you in here again."

The next day, the same guy walks into the bar. The bartender says, "What the hell are you doing in here? I can't believe you've got the audacity to come back!"

The guy says, "What are you talking about? I've never been in this place in my life!"

To which the bartender replies, "I'm very sorry, but this is uncanny. You must have a double."

The man replies, "Thank you! Make it a scotch."