I don't know where he got this, but Nate has taken to saying "Never!" in very dramatic manner and tone whenever he doesn't like direction from me. Here's a sample dialogue from a recent conversation I had with my child:

Me: "Nate, you have to sit at the table to eat your treat so you don't make a mess all over the place."

Nate: (imperiously) "Never!"

I mean, what's that all about and where in the world did he get this? I hope he's not doing this to his teachers (no one has informed me yet that he is). He's in superhero phase so maybe he got it from that???? Who knows. We are working to constructively change this tendency of his. Wish me luck!