@solderandchaos “What is north?” is a slippery one. Matt Parker has a good video on it you’ve probably seen.
As a red-green colorblind person, “what color is this?” seems to endlessly fascinate others. 😅
@bytex64 ooh the colour is a good shout! Could go the blue gold dress!
@solderandchaos If you’re prepared for the intensity of the argument, sure. 😄
I also think something like XKCD’s color survey would be interesting. https://blog.xkcd.com/2010/05/03/color-survey-results/ Give a small set of colors and ask them to name them in secret and compare afterwards.