There's an old Shona belief that a person who is alive today is not original but has appeared before in the past and will appear again in the future. As there are only so many types of stories you can tell, there are only so many types of humans that are possible. I thought of this belief when looking at SAM's funerary portrait of a 1st or 2nd century Romanized Egyptian. You see who he is?
Bill is a type that has appeared in the past and will appear again in future.