[suresk]

I agree with the assertion that few (probably close to 0) programmers routinely write bug-free code, but I think "incompetent" is a bit harsh - "imperfect" is more apt, I think.

Very, very few non-trivial pieces of code are completely bug-free, and building anything interesting under normal time constraints is really difficult and expensive to prove 100% correct.

So, I guess that point is true, but ultimately not very useful.