It's entirely possible to have completely bug-free code, that's how we have complex systems that work, including planes that don't fall out of the sky (some of

It's entirely possible to have completely bug-free code, that's how we have complex systems that work, including planes that don't fall out of the sky (some of this is based on formal proofs and verification, expensive but it can me done). Further, the assumption that your code will be buggy (at some point) is not a lowering of standards but crucial to ensuring that you're vigilant in both analysis and testing. Having said all that I think the code is a poor analogy, as where a function or module usually has an agreed correct behaviour or outcome the same is not often true in the real world, and the things that get reported on are often those that are most disagreed-upon.