LMAO, Andy Schlafly attempts to explain the application of mathematical sets on Conservapedia:

Another striking example is the how traditional marriage provides a greater set than otherwise: the union of A = {a, b, c, d} and B = {a, b, c, e} is merely {a, b, c, d, e}, while the union of M (man) = {a, b, c, d} and W (woman) = {e, f, g, h} is {a, b, c, d, e, f, g, h}, which is a broader and more diverse set.

Ok, I don’t claim to be a mathematician or to have even payed much attention in math class. But even I know that your simply pulling this out of your ass Andy.