There's this American pretense, which is the pretense of the journalist with the view from nowhere - which has somehow morphed into the journalist who was born this morning. So, he doesn't know that Donald Trump lied yesterday, and the day before. So, he concludes that he doesn't know whether Trump lied accidentally or on purpose. You can only pretend not to know that if you don't know that he lied yesterday, and the day before. So, to my mind when NPR says they don't know if he's intentionally lying, they're lying. We have to be smarter about it.