One of the most perverse parts of the post-debate discourse is that Trump became increasingly incoherent over the course of the debate, but nobody seems to care because nobody expects Trump to know what he's talking about to begin with.
I'm a brain doc (Consultation-Liaison psych).
For *years* Trump's shown uninterrupted, increasingly severe cognitive symptoms: he's incapable of linear thought at baseline.
Whatever disrupted Biden's linear thought in the debate is at worst intermittent.
Bonus: he's not an overt fascist.
