Trump doesn't "know what it is to know something"

From George Will in the Washington Post:

It is urgent for Americans to think and speak clearly about President Trump’s inability to do either. This seems to be not a mere disinclination but a disability. It is not merely the result of intellectual sloth but of an untrained mind bereft of information and married to stratospheric self-confidence...

What is most alarming (and mortifying to the University of Pennsylvania, from which he graduated) is not that Trump has entered his eighth decade unscathed by even elementary knowledge about the nation’s history. As this column has said before, the problem isn’t that he does not know this or that, or that he does not know that he does not know this or that. Rather, the dangerous thing is that he does not know what it is to know something.

Kevin Drum on the Comey firing:

...Trump's astronomical ignorance has finally caught up with him. He seems to have had no idea that firing Comey wouldn't stop the investigation—nor that a new FBI director wouldn't dare quash it. In fact, all the firing does is make the investigation untouchable. And Trump's astronomical narcissism has caught up with him too. He has so little insight into other humans that he simply couldn't conceive of anyone hating Comey but still defending his right to serve out his term. In Trump's world, you reward your friends and punish your enemies and that's that...

Rob's comment:
Trump is a very stupid guy, the dumbest president since, well, George W. Bush.