The Law of Fives is a principle of discordianism, as detailed in the fictional Illuminatus! Trilogy by Robert Shea and Robert Anton Wilson.
According to the, Principia Discordia, The Law of Fives states that All things happen in Fives, or are divisible by or are multiples of Five, or are somehow directly or indirectly appropriate to 5. It also observes that the Law of Fives is never wrong.
This explains the mystical significance of the number 23 (2 + 3 = 5).
Of course, as Hagbard Celine points out in the appendix to The Illuminatus!, the law depends on ingenuity on the part of the demonstrator, and as such a law of sixes would be equally valid.
The Law of Fives Is also the title of a poem based loosely on this principle. The first two parts of the poem can be found at 1 and 2.
