I know what you mean about Lewy Body Dementia. My grandmother had it, and in the middle stages, she would have spells when she thought she was in Dublin as a girl watching the Easter Rebellion and the burning of the General Post Office.
Funny Grandmother ....she might have been performing for you and family. For your expectations. Or half so doing this.
I just read an article on AT by a doctor who said that one of the symptoms of Lewy Body Dementia is visual hallucinations.
I am reminded of the number of times Biden has reached out to shake hands with an invisible person.
My BIL thinks our Chihuahua is a cat. Some days he knows my sister some days he asks her who she is then introduces himself to her. He could not read his birthday card the past couple of years. He can’t add two and two. He can’t remember how to tie his shoes. He walks slumped to one side which is a sign of Lewy Body.
If Biden had Lewy Body he would not be able to even perform as horribly at a debate as he did.