People with face blindness" can see facial features just fine; if they were looking at a face they could describe to you what it looks like. But they cannot retain a memory of it. In severe cases people don't even recognize their own face when they look in the mirror. Learn what face blindness is all about.
That man dressed in animal skins and running around Jerusalem trying to baptize people isn't alone. Tourists in Jerusalem sometimes suffer from a strange conviction that they are Biblical figures. Are they mentally ill or is there more to it?