as it worsens, the common features become more obvious. There are different causes but without access to his medical history and records, and an exam, we can't know for sure.
I would put Biden at Stage 2 or 3. (More toward 3 is likely when his meds wear off and when he is tired at the end of the day).
Either way, he admitted to setting up a fraud system for his election - whatever his mental condition.
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