pragmatism: philosophical movement based on scientific truth verification, when arguments work. Demand for practice for checking a criterion, a theoretical fact or an absolute experience. Pragmatism can be active or passive in nature: a passive character, when checking does not require activity or use of technical instruments, as in the case of the dreamlike lucidity, objective deep meditation and miracles; and has an active character when checking demands the use of artifices technological, as in the case the experimental sciences: laboratory and didactic.