A Spinning Ball Is a Tough One to Hit True

Any tennis player, particularly a relatively bad one like me, will tell you that a rapidly spinning ball is a hard ball to return effectively on the bounce.

Ditto North Korean economic improvement measures. Is it better to try and hit the ball while it is still in the air, spinning as it has been spinning for the last 60 years, knowing that will result in a weak return that could be pounced upon by one's opponent, or would one be better off letting it bounce before returning it, knowing that this will either result in a fabulous cross-court winner or a disastrous hook over the fence and into the park beyond?

More on why this matters here.