Simple math again. Pi is - for now - an irrational number, so its approximation can change.

e.g. 22/7 or 355/113. Xerox was right to issue that remark.

Since the proof is deterministic this CAN change. (highly unlikely, though)

Yes: I know that, you know that, and it's even possible that Xerox knew that; more to the point, a new architecture of computers might have made it worth adding a few more digits to the definition. But it takes a particular type of nerd to appreciate that, and the majority is content to mock what they consider to be an absurdity.

Similarly, it takes a particular type of nerd to appreciate- and even minimally care about- the roots that underlie the semantic absurdity that is a writable constant. The majority is content to mock what they consider to be an absurdity.

Now it's not widely appreciated, but at the same time that Xerox PARC was contributing massively important R&D to the overall computing community, Xerox still had frontline salesmen trying to flog 8-bit computers into business: see for example

https://en.wikipedia.org/wiki/Xerox_820 . Xerox is, by now, effectively buried: as is Borland and its successor companies and their products. I'd rather not see that happen to FPC/Lazarus.

MarkMLl