ViolentPanda
Hardly getting over it.
I've read a lot of this thread, though not all of it. What I see is the same arguments as on other threads that I have read in full. Forgive me if this has been covered here, but I haven't seen it elsewhere on urban (or have missed it).
1) I think it's uncontroversial to say that babies are assigned a gender at birth, based on their external sex characteristics. Sometimes these are ambiguous and what happens next (surgery, deferred decision, assigning a gender anyway) will depend, but in the main, this is how gender assignment happens. I'm not glossing over what happens in ambiguous situations because they're unimportant - they're clearly very important, especially for the people affected - but because I want to see if we agree that the above is how gender assignment happens when there are unambiguous external sex characteristics.
2) I think it's also uncontroversial to say that there are differences between the genders in brain structure and function in childhood and in adulthood. There is plenty of evidence to support this. Do we agree?
3) It's more controversial to say, but possible for everyone to understand, that gender-based brain differences in structure and function in childhood and adulthood can be a product of the socialisation that results from the gender assignment in point 2. Note the deliberate omission of a definite article in front of the emboldened phrase in this point, 3.
4) Accepting that gender-based brain differences in structure and function exist demands the very important caveat, imo, that any conclusions on the 'moral' or 'natural' rightness of particular power structures (by this I mean patriarchy) need to be treated with extreme caution.
5) Is everyone aware that some brain structures differ between babies depending on their external sex characteristics at birth? There is evidence. At birth being the salient information. Because unless we believe that gender conditioning begins in the womb, socialisation cannot account for these differences. Here's some evidence that differences are present at birth (key bits emboldened):
6) If these differences are present at birth is it not possible that they are the source of the knowledge that one's gender has been wrongly assigned and that one's body has come out all wrong?
Disclaimer: I'm a cis woman and so may be cisplaining; if so it's because I haven't read the thread in full (I think and hope!).
tl;dr: Some sex-based differences in the brain are present at birth which suggests it's possible to have a gender from birth that is different to external sex characteristics and independent of gender socialisation.
The problem is that sex-based structural differences of brain don't necessarily map to gender at all. Our current state of knowledge on gender as it pertains to the interface between brain and mind is still mostly supposition.
So yes, it's possible, but we're still too deep in theory rather than fact to advance beyond possibility, sadly.