Good question. My belief is you cant know a persons gender by just looking at them. You can assume, but that doesn’t mean you’re right or that you won’t cause harm by misgendering them. The reference in the article to “you don’t look trans” is to demonstrate the way in which cis people can cause harm by assuming that appearing to be cis (at least in their assumption) and conforming to social norms is to be applauded. When the impact of saying so can often be the opposite. What are your thoughts?