Customer: An argument is a connected series of statements intended to establish a proposition.
Arguer: No it isn’t.
Customer: Yes it is! It’s not just contradiction.
Arguer: Look, if I argue with you, I must take up a contrary position.
Customer: Yes, but that’s not just saying ‘No it isn’t.’
Arguer: Yes it is!
Customer: No it isn’t!
Michael Palin and John Cleese in ‘The Argument Sketch’ from the surrealist comedy legends Monty Python.