When I first stepped behind the host lectern on the quiz show “Jeopardy!,” I was intimidated for two reasons. Most obviously, I had the hopeless task of filling the very large shoes of Alex Trebek, the legendary broadcaster and pitch-perfect host who’d been synonymous with the show since 1984.

But I was also keenly aware that the show was one of TV’s great institutions, almost a public trust. Since I was 10 years old, I’d watched Alex Trebek carve out a safe space for people to know things, where viewers get a steady diet of 61 accurate (and hopefully even interesting) facts every game. And I wondered: Even if “Jeopardy!” could survive the loss in 2020 of its peerless host, could it survive the conspiracy theories and fake news of our post-fact era?

Facts may seem faintly old-timey in th

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