They're not associative, sure. But that's a very far cry from claiming they're non-deterministic.

There are enough problems for a 44 page paper titled "What Every Computer Scientist Should Know About Floating-Point Arithmetic"[1] I don't quibble on the language because I know what people mean.

Most folks won't encounter most of the issues, generally. But expose your code to a large enough dataset, or be like me and write a CAD/CAM system with motion control and experience most of them.

That's why I wrote hyperreal[2]

1: https://www.cs.tufts.edu/cs/40/docs/WhatEveryComputerScienti...

2: https://github.com/timschmidt/hyperreal