In the novel 'Don Quixote' by Cervantes, Nobel-winning physicist Erwin Schrödinger noticed one thing strange: “Sancho Panza, who loses his donkey in one chapter but a few chapters later, thanks to the forgetfulness of the author, is riding the dear little animal again".
Have all the readers of 'Don Quixote' kept tabs on the donkey? To begin with, it was a question of inconsistency, and Schrödinger equated it with his own: "some parts of this narrative may be inconsistent with others". Around 1700, Newton concluded that light was a group of particles (corpuscular theory), and around the same time, some other scholars thought that light might instead be a wave (wave theory).
In his classic paper, 'What is Matter?’ Schrödinger wrote: everything, anything at all, is simultaneously particle and wave field. Both the particle view and the wave have truth value, but we do not know how to combine them. At one point he asserts "Panza’s donkey will return". Well it returned, right? But that second coming becomes enigmatic when we ask what really these corpuscles are?
Schrödinger said, "I ought to confess honestly that I am almost as little prepared to answer that as to tell where Sancho Panza’s second donkey came from".
It is amazing how fictional material readily connects to a scientist’s preoccupations. Anyway, it makes me wonder whether great scientists read works of fiction differently.