"Cis" and "trans" are different types of a person's.... what?
What are cis and trans alternate types of? I don't think it's "gender identity" because wouldn't that just be man, woman or nonbinary regardless of whether they're cis or trans? Cis/trans just being a qualifier?
If the answer is "I am cis" or "I am trans", what is the question?
Edit: Someone came up with the term "gender congruity" and (after looking up the definition of "congruity") I think this describes what I'm talking about perfectly.
If your point is that phenotype at all defines sex, you are objectively wrong. It is a function of sex. If your point is that phenotype is a reliable indicator of sexing in humans, you are also objectively wrong.