This chapter delineates the factors that make an individual draw conclusion prematurely. As Kahneman explains, there are significant circumstances that invoke an individual to surpass critical reasoning and imply conditions, actions or even perceptions. The author illustrates how an individual makes choices and how those choices depend on the understanding of a situation. Moreover, he clarifies the concept of a bias in belief whereby people tend to develop an initial trust prior to obtaining further information. System 1 stimulates the automatic tendency to believe, whereas System 2 involves a critical evaluation of a situation before concluding.