> some programming languages just injects symbols based on context Well, okay, yes, not all software projects deliver reproducible builds of their software. So

> some programming languages just injects symbols based on context Well, okay, yes, not all software projects deliver reproducible builds of their software. Some software is, in fact, complete garbage. I'm also not using Gene Ray's TimeCube theory[0] as an example of a mathematical paper. > This sort of time variance is non-existent in math Not... entirely. You could cite a preprint that then changes in the final version. > And you have probably seen a programming tutorial or similar which uses library functions that no longer exists in modern versions Sure. And cited papers can be retracted entirely. [0] https://web.archive.org/web/20070718050305/http://www.timecube.com/ https://web.archive.org/web/20070718050305/http://www.timecu...