No.

Mr. P has learned the word, "No."

And not just mimicking his parents saying, "No, no!" which, for a while, was actually pretty cute. No, now he has fully grasped the meaning of the word and figured out that he can say it to state his independence.

Me: "Did you poop? Ok, come here, it's time to change your diaper."
Mr. P: "No." [with sly smile across his face]
Me: ...

Joy of all joys.