Kahneman in the chapter named science of availability believes that we judge a case at hand from the frequency of a similar event from the past. Both systems are involved since one part is deliberate, while that of System 1 is automated. The availability of psychology states that when no background information is availed to System 1, one may not arrive at a decision. System 2 has a way of resetting expectations of System 1 to normalize an event that otherwise could have been surprising. The bias as a team one result of availability creates overconfidence where an individual who has had a series of success still believe in succeeding.