Bıdɛn does not have a super unique face. He's an old white man with blue eyes, and a certain basic head shape. I'm sure there are guys "close enough" especially if you slightly modified the hairline, did a bit of minor plastic surgery, etc.
Here is why I'm willing to believe there's a problem.
I am fascinated with human beings, human nature, human psychology. Did you know how flawed human memory is? I'll tell you about one experiment you probably won't believe, but it happened. They took a class of students, and at their reunion (don't remember how many years after graduation) they introduced a fake event that DIDN'T take place, but certain agents put forward as having occurred -- I think there were even some pictures. But here was the event:
A class field trip involving a hot air balloon ride. You'd think that would be something either you did it, or you didn't -- but no, the students all went along with it. In fact, students even made up memories. They filled in many gaps, even humorous anecdotes and incidents that happened on the trip!
That made an impression on me.
https://www.bbc.com/news/science-environment-24286258Also, I watched some videos by the ɧoɱosɛҳųαƖ "NLP" mentalist Darren Brown a few years ago. He was able to pay for expensive jewelry using blank slips of white paper. He also had this setup where he was talking down the street talking to a guy, and someone comes in between them with a large painting or something -- during that time, a pre-arranged replacement comes in and Darren Brown leaves. One time, he was replaced with a black guy (Darren Brown is white) and the man he was talking to didn't notice or care.
All kinds of stuff like that.
So do I believe that they could replace Bıdɛn with someone else "vaguely" similar in appearance, and most people wouldn't care/notice? YOU BETCHA. I don't know the psychological name for this phenomenon -- something like "normalcy bias"? --
but just the fact that the Media puts a man forward as Joe Bıdɛn is 99% of the evidence most people need -- including most of us on CI -- to believe he's the real deal.