Before its release in August 2020, director Christopher NolanSo is the main character — referred to simply as “Protagonist” — a modern Maxwell’s demon? “Don’t try to understand it.”(If you look closely, Maxwell’s demon appears on the whiteboard in the background). In 1948, mathematician Claude Shannon interpreted the entropy of a random variable as the average level of information or uncertainty inherent in its potential values. Along the way we hear about a “positron moving backward in time,” the“Does being here now mean it never happened?” Protagonist asks. The physics throughout Tenet indeed constructs a “twilight world.” Although the film is not particularly scientific, who knows?