This story begins in a lecture room on an upper floor at Temple University in Philly on a pleasant summer day in 2018. John Hauser is delivering a cracking talk on recommendation engines. He launches into an aside about how the best real estate agents on earth facilitate their consumers’ own discovery of their own preferences. He’s challenging conventional doctrine. The grizzled grizzlies fold their arms and lean back in their chairs. The students from KU lean forward. I catch Luo’s eye and exchange smiles. We’re beaming. I got my popcorn ready. This is gonna be good. He tells a story about how an excellent real estate agent will listen patiently as you state preferences, and then they go onto[…]