The analogy I like to think of is a ping-pong ball in the ocean. At any given second, its location will be hard to predict, as at the second-granularity, its lo

The analogy I like to think of is a ping-pong ball in the ocean. At any given second, its location will be hard to predict, as at the second-granularity, its location will be dominated by local phenomenon. But, over the course of months and years, we can often accurately predict where it will generally end up in the world due to ocean currents.