As I stated in my addendum, “I did not say that Joe Biden shows no disturbances. Indeed, he shows signs that may be of concern under ordinary circumstances. But as long as we refuse to confront the current emergency,… it will be a distraction.” I have, of course, not done a comprehensive analysis, but what I have done amounts to a screening for the need for further evaluation. Whereas a few minutes of observing Donald Trump in interaction with his followers raised alarms for me, I have observed a number of Biden’s “slips” (frequency matters more than sheer number), and, still, none rise to the level of suspecting disqualification. I still recommend testing for him, for, by far, he is the cognitively weakest among all Democratic candidates.

Forensic psychiatrist, violence expert, president of the World Mental Health Coalition (, and editor of "The Dangerous Case of Donald Trump.”

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