I've never before seen a Twitter poll in which the correct answer got so few votes! My hypothesis was that since chocolate = white chocolate + dark chocolate, people would tend to feel that one or the other was the real chocolate. And we can tell the real one is white, since... https://twitter.com/ESYudkowsky/status/1274378371602903040

...if you label a bowl "chocolate" and fill it up with white chocolate, milk chocolate, and that stuff that tastes like solidified bitterness and disappointment, people will...

...eat the chocolate and leave the nonchocolate as a residue on the bowl - which ends up containing "dark chocolate" long after all the actual chocolate is gone. I've observed this to work no matter how many people are around the bowl or what preferences they claim to have.