Okay, seriously, I'm still a little obsessed here. We've got this blue-black/white-gold dress and a very interesting difference of perception. None of the explanations are really satisfying to me — I understand about white balance, but usually most people seeing a daylit photo incorrectly set to tungsten respond with "what's that weird blue tint everywhere? some kinda instagram filter". Here, though, to some people, the perception is so strong that even the idea of a blue tint is sometimes discounted.
This is fascinating to me as a photographer, and it seems like it should be fascinating to a lot of us, especially because we obsess so much about color calibration and getting colors to be accurate — yet here, the same image, seen by people from the same culture in the same conditions on the screen, clearly is perceived differently.
So, what am I doing over on meta? Well, what I really want to ask is "Can anyone reproduce this binary perception effect with a totally different subject?" I don't care how you do it... with an originally blue/black object or white/gold, or with gelled lights, or whatever — just, reproduce the effect in another scene. By doing that, we should be able to identify what elements are really essential to the effect.
But, fundamentally, "can you do this?" is more a challenge than a question. What do you think — okay to ask? Or should I just let it go?