It's not false - strictfp mandates deterministic FP. If you use that your program will always run all floating point calculations in exactly the same way, full stop.
Secondly, on mainstream implementations, strictfp is already documented the same as default! They're planning to remove it anyway as it's a no-op in almost all cases.
> It's not false - strictfp mandates deterministic FP. If you use that your program will always run all floating point calculations in exactly the same way, full stop.
If you use it. Which is not the default. Your original claim remains false.