I don't think you quite understood the article :P

It's incredibly hard to specify things unambigiously. Even in common workday practice, communication problems cause tons of problems; you always have to make assumptions, because absolutely precise definition of everything is extremely wasteful (if it's even possible at all). I cringe whenever someone says "But that's obvious! You should have thought of that automatically!". Obviously, their model of reality (wherein I am aware of that particular thingy) is flawed, since I was not.

That's the largest problem when delegating any work, IMO - we all have different preconceptions, and you can't expect anyone else to share all those relevant to any given task. At least anything more complicated than pure math :D