Wow.. I'm going to fully confess here, the things talked about in this topic made my brain melt lol! It may very well be because I have a cold and my brain is all fuzzy, but I had a really hard time trying to grasp the complex nature of what's being said especially in the more recent posts, and I'm 99.9% sure that I still don't understand in spite of re-reading things several times.
With that in mind, I'm going to lay down my own thoughts here, and perhaps one of you with a brighter mind than my own right now can let me know if it runs with or against the ideas being discussed here lol
I've come to the conclusion that gender isn't inherently a sliding scale between "masculine" at one end, and "feminine" at the other, but rather its a constellation of traits that make up who you are. It's about how your brain is rigged to process information coming in from your senses. Is your brain wired to be empathetic or sociopathic? Is it rigged to process information using logical reasoning or intuitive reasoning? Is it good at multi-tasking or spacial reasoning? You get the idea. Each mutually exclusive set of traits can be thought of as each having a sliding scale from one extreme to the other, and all of the traits that make up the way you process the world come together to make up you - your personality. Gender is really the names we give to particular constellations of traits, just like we give names to certain patterns of stars in the sky.
Is your brain rigged to process information intuitively, is highly empathic and good at multi-tasking? We call that a "female / feminine" constellation. We might say the opposite (logical, less empathetic and good at spatial reasoning) is a "male / masculine" constellation. Are these labels arbitrary? Yeh to a large extent, they are. They come from the fact that we see particular constellations of traits appearing more frequently in one particular sex than another. The problem of course is obvious - "female / feminine" and "male / masculine" doesn't cover all the possible combinations by a long shot. Even with just the three traits I mentioned above (note that is far from an exhaustive list of traits), you can't possibly accurately describe all 27 combinations they could be in if the traits were treated in a binary way with just two constellation definitions, never mind the hundreds of possibilities if they're treated as a grey-scale, and never mind the
thousands of possibilities when you take into account all the different personality traits a human can possibly have.
Is gender inherited at birth? Yes, in the sense that your personal constellation of traits is set at birth and you can't really do much to change that, but no in the sense of how we define / label those constellations.
As I say, gender identity is the label given to your constellation of traits. But where we get those labels from in the first place really boils down to comparing ourselves with other people (imho). Who in society do I know who has the same (or similar) constellation of traits to myself? Family members, friends, celebrities and the like are all valid societal pools to draw from when trying to discover those we can
identify with and in turn help to define ourselves. Does your constellation align with the typical constellations of women? Then your brain says "oh, I must be a woman, I should do what they are doing". Notice how your own physical sex doesn't factor in here? That's where I think the dysphoria comes into play - your brain has locked on to (for example) women because it identifies strongly with them because its constellation of traits is the same or similar to theirs. When society then turns around and says "no, you have a penis, so you can't behave like that, you have to behave like you have this other constellation of traits instead", your brain naturally goes "wait.. what..?! 0_o"
Oh crikey, this is getting long lol. I'll leave it there but hopefully you all get what I'm trying to say here