I didn't say it was a good definition :)

In fact, the very point you're making here is also commonly brought up whenever someone uses this common definition to try to argue against trans issues, which is how I know it's commonly used.

I rather hopped that me saying "birds would be all be male" would be a hint that I didn't hold this definition in high regard.

> whether something is a fruit or vegetable?

Tom-ah-to, to-may-to, but either way I really need to figure out how to use it in a fruit salad.

Sure, almost everyone has had such an argument; but I've noticed many tend to say "it's common sense" and stop listening from then on.