I found usage really helps you learn how to WAG (Wild Ass Guess). It also scares the crap out of me to think about what infinity is: you see your slide manipul

I found usage really helps you learn how to WAG (Wild Ass Guess). It also scares the crap out of me to think about what infinity is: you see your slide manipulate incredible numbers, then you imagine a slide that is twice as big. Or a few feet long.