Reb, i was in Central Park, NYC, one time and i was photographing a tree. a man walked over INTO my view....i lowered my camera and he said this, "i'm who you think i am".....i looked him over, carefully, and said, "i don't think you're who you think i think you are"......it was Isaac Asminov!!! i went with him to a book signing and he gave my oldest stepson his latest book!!! you're right, i don't know who the last two are..pray tell!!