While reading Good Omens by Terry Pratchett & Neil Gaiman, I stumbled across the following quote, in which Aziraphale’s calculations are described:
But these other calculations were of a kind no computer could ever do. Sometimes he would scribble something on a sheet of paper by his side. It was covered in symbols which only eight other people in the world would have been able to comprehend; two of them had won Nobel prizes, and one of the other five dribbled a lot and wasn’t allowed anything sharp because of what he might do with it.
Who is that last person they’re referring to? I looked it up, but found no explanation. I feel like I’m missing a pop-culture reference.
Edit: By the way, my edition is the GOLLANCZ 2013 and the quote is on page 168.
Edit 2: I'm so glad that a simple question like this brought me closer to such brilliant answers.