Terf test: give a compliment like “wow! (Thing) has really been popularized by transwomen, and it looks so good on you!”
If they try to distance themselves from it, theyre anti-trans
at the surface level it’s just grammatically incorrect, trans is an adjective that describes a woman (like tallwoman would be incorrect vs tall woman). however “transwoman” is actually also a dogwhistle, it makes it into noun that separates trans women from other women.