Act Now

Let A be the set of "Politics", B be the set of "not Act Now", C be the set of "Act Now".

If B is a subset of A, clearly, C intersects A - B.
But, somebody said that C does not intersect A.
Ridiculous! How can it be possible?

The only reason is that, A = B, so A - B is an empty set.
But, nobody will agree that A = B.

算吧啦，因為「Act」，這個情況下是解作「扮野」，哈哈哈哈哈）））））））