"In analytic philosophy, the term anti-realism describes any position involving either the denial of an objective reality or the denial that verification-transcendent statements are either true or false. This latter construal is sometimes expressed by saying "there is no fact of the matter as to whether or not P". Thus, one may speak of anti-realism with respect to other minds, the past, the future, universals, mathematical entities (such as natural numbers), moral categories, the material world, or even thought. The two construals are clearly distinct but often confused. For example, an "anti-realist" who denies that other minds exist (i.e., a solipsist) is quite different from an "anti-realist" who claims that there is no fact of the matter as to whether or not there are unobservable other minds (i.e., a logical behaviorist)."