Usually, those who experience anger explain its arousal as a result of "what has happened to them" and in most cases the described provocations occur immediately before the anger experience. Such explanations confirm the illusion that anger has a discrete external cause. The angry person usually finds the cause of their anger in an intentional, personal, and controllable aspect of another person's behavior. This explanation, however, is based on the intuitions of the angry person who experiences a loss in self-monitoring capacity and objective observability as a result of their emotion. Anger can be of multicausal origin, some of which may be remote events, but people rarely find more than "one" cause for their anger. According to Novaco, "Anger experiences are embedded or nested within an environmental-temporal context. Disturbances that may not have involved anger at the outset leave residues that are not readily recognized but that operate as a lingering backdrop for focal provocations (of anger)." According to Encyclopædia Britannica, an internal infection can cause pain which in turn can activate anger. According to cognitive consistency theory, anger is caused by an inconsistency between a desired, or expected, situation and the actually perceived situation, and triggers responses, such as aggressive behavior, with the expected consequence of reducing the inconsistency.