I don’t know why the question is met with such ridicule.
With parametric CAD software, you can always see exactly how you built your model in the feature tree.
In Alias, a CAD software that is very much like Rhino, you can “query” a surface, and the tool that built it will pop up with all values intact.
Even though Rhino has history on some surfaces, only very few of them (“blend” surfaces, and I think “fillet edge”) can be brought back with a small “edit” button in the command line. Perhaps untrim with “KeepTrimObjects” can be counted towards this as well.