Principles in this wiki are categorized by evidence or level of acceptance. A principle is marked accepted if and only if it is widely used in practice. Acceptance is assumed if a publication (a book, etc.) well-known among practitioners describes it. So an accepted principle can be regarded state of the practice. If the principle also has been subject to scientific research, it may additionally be marked examined.
An accepted principle may still be questioned by some people.
In order to see which principles are accepted, use the backlinks feature of the wiki software.