Among life’s most liberating experiences is finding yourself unambiguously wrong: your mind is cleared of cant, and the world is transformed. (This requires the wit to perceive your error and the courage to acknowledge it, apparently not presidential qualities.) Max Krohn, a cofounder of SparkNotes and OKCupid, had such an experience as an undergrad when he encountered the ideas of Alan Turing and Albert Einstein. A conversation at the Scarsdale Library with music from Freddie Bryant.

•  PERSON: Alan Turing
•  PLACE: Harvard computer lab
•  THING: this audio cassette
•  RANDY’S THING: a fax machine