[krapp]

No they aren't.

[jodrellblank]

John Cleese: "Look, if I argue with you, I must take up the contrary position"

Michael Palin: "That isn't just saying 'no it isn't'"

Cleese: "Yes it is"

Palin: "No it isn't!"

Palin: "..."

( https://youtu.be/uLlv_aZjHXc?t=79 - Monty Python's Argument Clinic )