I saw Laverne Cox in person once. Seeing someone in 3 dimensions in the flesh is very different to seeing them in a still photo or on screen. IRL, I don't think Cox passes at all.

When photographed standing alone in a still shot, like in the famous TIME magazine cover, or when Cox is filmed or taped alone in a position where Cox isn't moving around too much, like in the recent video Cox did promoting a project on women's history, maybe a few people here and there might think Cox passes for a second or two. But when seen amongst other people, and especially when seen next to or near adult human females, Cox stands out like a proverbial sore thumb.

Cox is huge, with very broad shoulders, a very large head, giant hands and feet. Even when Cox is wearing the usually big head of store-bought, teased-up hair grown by impoverished, downtrodden girls and women in the third world, Cox's skull and the way Cox's head sits on Cox's neck are unmistakable tells that Cox is male - especially when Cox is seen in profile or partial profile rather than straight on from the front. Then when Cox gets moving on Cox's feet, there is no way anyone on earth would think that Cox has the gait, stride or foot plant of a female person.

I say none of this as diss on Cox. It's just that evolution has caused the males and females of our species to develop innumerable physical features that make it easy for most people to tell the sex of adolescents and adults pretty much instantly on first sight without any or much conscious thought. Due to evolution, our female socialization growing up, and years of lived experience always having to be on the alert, most women are really, really good at instantaneously sizing up and sussing out the sex of the adolescents and adults we encounter. Our safety depends on this skill.