Nope, no need to PhotoRead the book again. You've found the angle of discussion with the with a mind probing question. Seems to me that, that is what the book has a lot to say about.
Your change of purpose isn't a change at all. It's a stromg mind probimg question. What are you going to do with the information how George ranks with the other Presidents? Your origninal purpose - discuss it with a friend.
Alex