Can Brain Scans Prove Transgenderism Right?

Those who say “brain scans proves transgenderism” have only shown that some people who have identity disorders, gender-related or otherwise, may also have identifiable brain abnormalities. The truth is their brains do not “match” the other biological sex. They only have some characteristics that are shared. In fact, there is no single “male” or “female” brain, but common traits across a spectrum. 

The fact that the brains of transgender people resemble the gender they identify with but don’t match it is what we’d expect with someone who resembles something else in reality in some respects, like in their preferences, but doesn’t match that reality biologically. The fact that a man’s brain may be similar to the average woman’s brain in some respects doesn’t prove the man really is a woman. People with dissociative identity disorder (or multiple personality disorder) have brain abnormalities as well, but that doesn’t prove they are more than one person. 

Finally, these arguments also indirectly prove that sex is biological, because the claim that a transgender woman’s brain resembles a biological woman’s brain shows there is a difference between “transgender women” and “biological women.” They both aren’t simply “women.” The only way one could make this claim is if there is already a reference class called “biological women” that can be grouped together for brain scan experiments.