The Three Knuth Rule
"Hacker lore says that two heads are faster than one and three heads are slightly faster than two. Thereafter, adding manpower to a software project actually makes it slower. The only way to speed up a project is to use cleverer people. Hence the three Knuth rule. If three Knuths working together cannot do it, it cannot be done." -- ''Korner, The Pleasures of Counting''