Firstly, you should know: there is no bulletproof argument when your opponent’s main strategy is firing bullets into their own head. It doesn’t matter how rock-solid it is, they will find ways to either pretend it doesn’t exist, or twist it into a completely different shape so they can deny it.

Sex, in biology, is simply identifying dimorphic versions of a given species, where one version of the species produces spermatoza gametes and the other produces ova gametes.

TRA’s have various ways of trying to confuse the issue. They use people with DSD’s as human shields to say sex doesn’t exist, which is idiotic. That’s like saying that because some people are born missing part or all of their legs, that means humans aren’t bipedal. Disorders and genetic errors do not change the intended functionality of the organism.

They may also point to things like clownfish, who are in the less than 10% of species that do not have stable dimorphism. And the answer to that is simply: we’re not fish.

Some will claim sex is colonialism or something. And the response to that is have a stiff drink, in my opinion.