The principle of "Once and Only Once" originated in the world of programming, where it is considered foolish to do something twice that only needs to be done once. As it applies to a wiki, it means that you shouldn't duplicate any information or keep multiple copies of documents organized in different ways.

The violation of this principle can lead to many problems. These complications could include (but are certainly not limited to):

It becomes immediately clear than none of these outcomes would be good for our wiki or our wiki community, therefore, we feel that the "Once and Only Once" principle should be adhered to as closely as possible.