I don't usually put much credit in the body double line of argument. Biden is such a wreck, he is basically Silly Putty, capable of being molded in any way. But the absence of blinking is a physical anomaly. And---am I mistaken, or is his chin presented as having a pronounced dimple? I don't recall that. It looks almost as though his chin has two points.

His whole demeanor reminds me of John Malkovich in one of his edgy roles.