I was once talking with a professional negotiator (and a great story-teller) and when trying to explain what was so hard about programming, I said that it was l

I was once talking with a professional negotiator (and a great story-teller) and when trying to explain what was so hard about programming, I said that it was like getting a nearly unlimited amount of incredibly stupid people to work together to do exactly what you need. He then told me the story of his brother with Down syndrome who was once weaving a carpet and who happened to make two black spots right in the middle of the big white center of the carpet. When asked why he made that mistake the brother proudly proclaimed that it wasn't a mistake at all, ran to his pattern book and showed the pattern. It was perforated on those spots.