system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: The difference between gender and sex is incoherent

I hear trans activists say that people just don’t understand the difference between sex and gender. I admit that I am one of those people, but I think that it’s because the difference is incoherent. I’ll start with what I do know:

Gender is man and woman.

Sex is male and female.

I got that. I understand that much.

But everything gets incoherent after that.
Are trans women still male? If so, what does MTF stand for? If not, then what’s the difference between female and woman? If you can change your sex AND your gender, what does gender even mean? What does sex even mean? Some trans people say that a surgical change is necessary to be considered the opposite sex. Other trans people say that penises can be female. Who is right?

Is it possible to be a trans woman and identify as female? And if so, can a cis man identify as female without identifying as a woman? Could a trans man do that? Is any combination of cis/trans, male/female, man/woman possible or only some of them? If both sex and gender are changeable, then what’s the word for the identity that isn’t changeable?

I’ll be honest. I don’t understand the difference between sex and gender. But I don’t think anyone else does either.
gpt
"Gender" is the psychological aspect, "Sex" the physical one. That is the only real distinction.

The terms "man", "woman", "male" and "female" are not as clear-cut as you think they are. They are often used interchangably to use both gender and sex.

For the example of transgender people: the transgender person is born as one of the two sexes (ignoring the case of intersex people for now) but feels like a gender identity that does not conform to their sex. Later in life, they might want to undergo procedures to change their sex (the physical / biological part) to match their gender (the psychological part). After that, their sex and gender are "the same".

Now, there is a lot of debate about whether this is valid, whether one can truly "change their sex", whether gender and sex influence one another, etc.

There is, however, a clear distinction between psychology and biology, even if there are interdependencies.