Acronym it. This has become such a problem that it is even evaluated at the level of medical academies such as the American Academy of Dermatology. Acronyms are often taught as mnemonic devices, for example in physics the colors of the visible spectrum are said to be "ROY G. BIV" ("red-orange-yellow-green-blue-indigo-violet"). They are also used as mental checklists, for example in aviation: "GUMPS", which is "Gas-Undercarriage-Mixture-Propeller-Seatbelts". Other examples of mnemonic acronyms are "CAN SLIM", and "PAVPANIC" as well as "PEMDAS". It is not uncommon for acronyms to be cited in a kind of false etymology, called a "folk etymology", for a
Communication Theory as a Field that Myers own case study fails to back up his point. The metamodel itself does not distinguish the falseness of other models. However, contrary to Myers claim, the metamodel does allow theorists engaged in discussion to judge the validity of theories "on the basis of empirical evidence in ordinary reasonable ways." What the metamodel does deny is a universally established absolute truth in the field of communication theory. Craig points out that Myers was correct in that the metamodel is ill-equipped to judge theories as valid or invalid, it also doesn't do a good job of closing "the Antarctic ozone