I’m glad to now have it for myself, so thank you for that, but I don’t know that showing them real science will work because they are not coming at this from a rational position. All they see is “man = penis, woman = vagina” and no amount of science will change their mind. Even bringing up basic things like people born with both sets of genitalia doesn’t phase them. “Well that’s just the exception to the rule,” as if that’s a thing in science. So when they say that they have science on their side, what they mean is that they’ve found some scientific studies that agreed with their preconceived, unscientific notions.
As they say- you shouldn’t play chess with pigeons.