Separately, he'll not-infrequently claim he doesn't remember recently saying something insane/stupid when a reporter asks him about it a day or two later. Sometimes he'll kinda smirk when he does it, so I'm pretty sure this one's also him lying, not genuinely forgetting, at least much of the time (if he's really forgetting all of these, that's a separate serious problem). In these cases, also, he rarely gets much push-back, so it's another example of "yes he's bullshitting, but also we're letting him get away with it and get what he wants, so why would he stop?"