I had some contract work years ago helping some PhD program astrophysicists write scripts to make their research algorithms compute their data before their great grandchildren retire and one of the action items we never implemented was because someone wrote an “…etc” in the middle of the math.

They knew that everything was verifiably correct on the input, and verifiably correct on the output, and they swore they had figured it out at one point and just never wrote it down. I was asked if I could “just extrapolate it” and had to explain that computer programs work the same as math - I can give you a literally infinite number of ways to reach an output from an input.