John Rawls and Vonnegut's Cat's Cradle

Wikipedia's entry on John Rawls notes:

Rawls then married Margaret Fox, a Brown graduate, in 1949. Margaret and John had a shared interest in indexing - they spent their first holiday together writing the index for a book on Nietzsche[...] [...] he returned to the United States, serving first as an assistant and then associate professor at Cornell University. In 1962, he became a full professor of philosophy at Cornell[...]

I don't have Kurt Vonnegut's great novel Cat's Cradle in front of me, but I recall that the main character meets a couple (a duprass) who are devoted to indexing. Vonnegut was a student at Cornell, which was sort of the setting of his first novel, Player Piano. I wonder if there's a connection.