The Importance of Past Experience

Hume: We naturally take for granted that what's happened in the past will broadly continue into the future. He asks us to imagine Adam, the first man, created by God with perfect human intellectual faculties. How does he know, without prior experience to call on, what's going to happen when the two balls collide? He can't. So in fact, when you try to produce any justification, any argument, any reason for extrapolating from past to future, you can't.