[logician76]

Computers are inherently imprecise? Floating point is imprecise, yeah lets generalize that to the entire computer..

[mbq]

Float operations are actually precise, the catch is that floats are not real real numbers.

[meowface]

Is there any part of a computer that could actually be considered imprecise? Perhaps only if there is a hardware malfunction.

[Xixi]

You could argue that float/int arithmetic is inherently imprecise. It is, however, fully deterministic.

Of course as you hint in your comment, at a lower level hardware is prone to failures and lack determinism: bugs in the cpu, ram corruption (ECC-ram is of course better), data corruption everywhere on storage/network/data links, etc. Ever heard a gamer bitching about Windows 7 instability? That's not Windows, but overclocking not quite under control and/or insufficient cooling...

And when all is under control a cosmic ray might still wreak your bits havoc.

[tedunangst]

It's deterministic at some level, but can be very difficult to predict when a compiler will decide to spill 80-bit float registers to 64-bit doubles in memory.