Empirical facts are constructs based on regularities in a subject's experience. They are ";viable"; if they maintain their usefulness and serve their purposes in the pursuit of goals. In the course of organizing and systematizing experience, the subject creates not only objects to which independent existence is attributed but also Others to whom the subject imputes such status and capabilities as are conceivable, given the subject's experience. As in the case of concepts, theories, beliefs, and other more abstract structures, the facts a subject has found to be viable gain a higher degree of viability when successful predictions can be made by imputing the use of these facts to Others. This additional viability is the constructivist's counterpart to ";objectivity.";