You appear to be unhappy with the notion of reversible computation, but that is not the topic here. Time reversibility of most physics at the subatomic level i

You appear to be unhappy with the notion of reversible computation, but that is not the topic here. Time reversibility of most physics at the subatomic level is standard, mainstream, but also posed one of the biggest physics puzzles of the 20th century. It is still occasionally presented as a mystery, but generally speaking it is entropy at a macroscopic level that gives time a one-directional forward arrow. Edit: your profile makes it look like you might be a scientist, in which case nothing I said was new to you -- but then I don't know what you're referring to. Videos might be good for people to learn who don't want to read a book, I suppose, but books are typically far more information-dense.