Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.

A program that produces incorrect results twice as fast is infinitely slower.

Incorrect documentation is often worse than no documentation.

Unix has retarded OS research by 10 years and linux has retarded it by 20.

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.