Oliver says so.

Oliver:  "Mommy, did you know that dinosaurs are exstunk?"
Me:  "Mmm, really?  Do you mean extinct?"
Oliver:  "No, I mean exstunk."

Oliver:  "You know Stetson, you don't just automatically get your way."
Me:  "Oliver, did you just say 'automatically'?"
Oliver:  "Yes.  I learned that word from Dad.  Cool, right?"

Oliver:  "Mom, when in the world are we ever going to go to Texas?"
Me:  "Why do you want to go to Texas?"
Oliver:  "Because I want to see the whole world!!  We can start in Texas."

Oliver:  "Mommy, will you take me to the North Pole?  You know the one I'm talking about?"
Me:  "No."
Oliver:  "Why not?"
Me:  "Because I don't like to be cold."
Oliver:  "Well you know snow is much funner when you have a friend."