“don’t konow” ?? isn’t that like the first thing in his task description?

Yes. In fact, you couldn’t be more correct about the matter.

I would describe his response to the question as fully preposterous.

I would describe it as a dereliction of duty.

If Biden said that the headline would be “Sleepy Dementia Joe Biden Doesn’t Remember Oath of Office He Took Three Months Ago”. It would be brought up in every segment on every news station for weeks. Trump says it and the news is like “That’s kinda weird… Anyways, wonder what Elon is doing…”