No. The mule has just four legs. Calling a tail a leg doesn't make it one.

How many legs does a dog have, if you call his tail a leg? The answer is four, because calling a tail a leg doesn't make it a leg.

If you call a tail a leg, how many legs has a dog? Five? No, calling a tail a leg don't make it a leg.

How many legs does a dog have if you call his tail a leg? Four. Saying that a tail is a leg doesn't make it a leg.

If I were two faced, would I be wearing this one?

It was Lincoln who said that if you call a tail a leg, how many legs has a dog? The answer is four. Calling a tail a leg doesn't make it one. And calling a civil contract between consenting adults a marriage does not make it a marriage,