Stream of Think

A great (and what I am told is a famous) hypothetical:
"Plaintiff alleges that Defendant borrowed plaintiff's pot and put a crack in it. Defendant answers that he did not borrow the pot; alternatively, the pot was never cracked; and alternatively, the pot was already cracked when he borrowed it."
- "Would this pleading be permissible under Rule 11, assuming any reasonably likely set of facts?"