An uncomfortable conflict between two realities that do not match and that often leads to the use of the defense mechanism, rationalization.
Cognitive dissonance refers to a state of mental or emotional unease caused by conflicting thoughts, beliefs, values, and behaviors within an individual. For instance, a person may purchase a pair of well-crafted shoes only to discover that they are remarkably uncomfortable. To alleviate this discomfort, individuals may attempt to reduce cognitive dissonance by reinterpreting or rationalizing the situation. In the case of the uncomfortable shoes, the individual may convince themselves that the discomfort will subside with continued wear.