> You'd be surprised. People discern things of value from a one-time viewing of another person constantly.

True. I overstated my case a bit. Of course, no matter what they are wearing, it is something that exists in their wardrobe, but that may or may not matter.

> studies show the gaydar exists

This, I know from experience. I had a gay roommate once, and he taught he how to spot them, way back when they were still trying to be a bit unobvious. But, even though gay people usually dress better and in certain ways, that's not the usual tell. It's really not about the clothes.

> doesn't have to be accurate all the time to exist and be usable

This is paradigmatic "system 1" thinking. We all use it, but sometimes the failures are catastrophic.