Law of 25s
The Law of 25s is the primary difference between Discordians and Accordians. While the original doctrine of Discordianism (the Law of fives) held that all things are related to fives, the wise and wonderful Father Nemo Proprius noted during The Accord that the rule was self effacing, since all fives should also happen in fives, and hence be in 5 5's, or 25's (25s). Accordians hold the law of 25s above all else and it is never wrong.
Infidels and blasphemers criticize this law, claiming that all 25's should happen in 25's as well. They further make the absurd fallacy that such a mechanism can extend the law to the law of infinities. A collection of such heretics (no doubt duped by the spirit of Greyface) broke away from Accordianism to found a separate church, The Church of the Geometrics, during The Schism of the Infinitism. These, however, were all killed by plague.
There are also those who claim that law of 25's should be the law of 125's, because all 25's should happen in fives. These people are pitied for their stupidity.
See also Law of fours