Think about it. We should be able to tell when he was replaced. Was it before Covid? When was the 1st time Trump said he wasn't the same person. The earliest I can find is Jun 2019. Which would make sense because they cheated in 2018. We can look at pictures & video broadcasts to help find dates.
Any one want to help here? Lets do some research.
Update: Looks like it happened right after Bush Sr Funeral in Dec 2018. There are articles about Biden going under plastic surgery at the beginning of 2019. All the photos don't look like him after the start of 2019.
I don't think it is a dupe or clone or masked person. It is just Joe after a lot of weight loss, (too skinny now - looks frail), another upper and lower face lift, neck lift, and a bit more hair transplantation to fill out the sparcest areas.
He's so pulled, the sides of his face look weird and he's got a 'beady-eyed' look due to lower lid blepharoplasty tightening the lids too tight, narrowing the opening of the eye.
In my opinion, it is still Joe - just older and weaker and more mentally deficient.