I finally got around to looking at RFK: Collected Speeches to see if that made-up Aristotle quote that Thurston Clarke referenced in his book was in the speech transcript there. Nope, and very odd.
Guess the next step is to get the Nolan interview from the JFK library: turns out that my local library can request a transcript. Not today, though, as the relevant staff members all happened to have the day off. I’ll let people know how it goes.
Crossposted to RedState.