[jcranmer]

One of the most useful skills I gained from programming competitions is the ability to write and debug an algorithm in my head. And I suspect your 60-page design document was written by essentially doing the same thing: coming up with a prototype design, and mentally testing it against the use cases to figure out if the design is workable, and committing the notes to paper only after you confirmed that it worked in your head.

[gavinhoward]

Interesting. Perhaps that is what I did.

I did do that to design the UX, but for algorithms, I am not so sure. I am really bad at coding competitions, for example.