Yes, but psychologically a trans person is really their psychological gender and also really their biological sex. But I, for example, can't be a trans woman no matter how artistic I feel about it because I identify as a man and that's not something I believe can be willed in and out of existence on a whim any more than sexual preference can. — Baden
So I've thought way too fucking much about this, and this is what I've landed on.
Your comments resort to a mysticism that I'm not fully able to decipher. Your man-ness under this definition is a geist, incapable of discernment. The term "transition" has alternative meaning under your analysis. At the pragmatic level of application, "transition" means certain medical procedures are performed, chemicals are prescribed, wardrobes are changed, and government documents updated. At the spiritual level, I'm not sure what it entails, but surely the concept of gender is not immutable, which means I might be a gender male when I'm a child only to undergo the mental change later in life and then to consider myself the opposite sex. This problem lays large in your analysis. As Lady Gaga wants to say "I was born this way," but that denies the possibility of transition and fluidity if how you are born is how you must be.
To the direct question, can one undergo a gender transition? (Note, I'm not asking if they can undergo a physical transition, as the answer is obviously that they can).
What I think to be the problem is that gender is
both a mental property and a social property, neither of which can be fully distilled from the other. That is, to say I am a man means not just I feel myself a man in some nebulous way, but it is to ascribe the social meaning of man-ness upon me. There is no coherence to the concept of the primordial man prior to social designations upon him. You can't claim this primitive man did the primary man things, like act on every sexual urge and do battle with his competitor males like some odd upright walking primate would. He did all sorts of things humans did because he never was a simple animal, but he had the social designations of maleness that were as much a part of his man-ness as his biological characteristics. What does a biological man that doesn't have any social manifestations of man-ness act like?
And this presents the limitations of the MU analogy presented by
@Michael. What could it possibly mean to be a Manchester United fan without the social designations of what that means? It must mean cheering for the team, wearing the jersey, and having friends and family who are also fans. To say otherwise presents this idea that there's this inherent identity of MU fan-ness that's just there, just part of the way he's made.
Consider another analogy. I consider myself Jewish by identity. It arises from the fact that I was born into such a family, all my early educators were Jewish, my friends and social network was Jewish, etc. If one were to speak to an Orthodox Jew, they'd even give a nod toward the mystical theory that I have the soul of a Jew that cannot be denied, regardless of how I might attempt to suppress it. That's a theory that's hard to accept, but it's not an uncommon way for a religious community to view things, and it seems oddly consistent with what is being argued for here.
It's also entirely inaccurate to say that I've always considered myself Jewish, as I have traveled through atheism and back. I'm not so ridiculous to think I embarked upon a worldly search for meaning and found that what was being thrust upon me was the truth I had been seeking, but I realize my current beliefs are heavily influenced by my social upbringing. By the same token, I am not an automaton, as I still had some choice in the matter of how I wanted to identify, and I suspect there might be some fluidity in that regard as I age, or, more likely I'll just get more stubborn and ornery.
My point here is that "woman" is a social term, a biological term, and a mental term, but there aren't boundaries around each. They correlate with and cause one another. Just as I could change my identity from being Jewish, I could change it from being a man, and that change would demand some physical act. If it did not require any physical act, then my change would be only to the ethereal ghost of identity within me, whatever that means.