A theory of explanation might treat explanations in either a realist or an epistemic (that is, anti-realist) sense. A realist interpretation of explanation holds that the entities or processes an explanation posits actually exist--the explanation is a literal description of external reality.
Officers in pay grades O-1, O-2, and O-3 with more than four years of prior cumulative service in an enlisted or warrant officer grade are paid increased wages using the special pay grades of O-1E, O-2E, and O-3E, respectively.
Examples of pay scales include U.S. uniformed services pay grades, the salary grades by which United States military personnel are paid, and the General Schedule, the salary grades by which United States white-collar civil service personnel are paid.xamples of pay scales include U.S. uniformed services pay grades, the salary grades by which United States military personnel are paid, and the General Schedule, the salary grades by which United States white-collar civil service personnel are paid.