[dreamcompiler]

Some of you will remember the "Pepsi Challenge" [0] when Pepsi would make commercials about random people tasting unlabeled soft drinks. People usually chose Pepsi in taste tests because it was sweeter than Coke. What the commercials didn't show was that most people actually bought Coke because Pepsi is too sweet for many people when they drink a whole bottle.

Movie and music recommendation engines seem to work like this. Human tastes are much more complex and multi-dimensional than "This person prefers genre X" but AI systems don't even come close to grasping the subtlety.

[0] https://en.wikipedia.org/wiki/Pepsi_Challenge