these lectures? I just wanted to be able to get up to date information out there without having to interact with all these fucking eggheads. I was lazy.") and Philo Taylor Farnsworth ("We've all flipped pages with slightly modified pictures on them in such a way as to trick they eye into believing there was a moving picture in front of us, but this required usage of a hand (often 2!) and certain thumb-based dexterity. After prolonged usage of the "flip-book" callouses could appear on the thumb.