It seems that according to the cognitive dissonance theory, when a person perceives an undeniable piece of information, but contradicts to their belief, it will create stress. They will either justify their existing belief and ignore the new one, or investigate the new information if there is a motivation to do that. In the case it evokes negative emotions (from past sufferings, say), and especially with emotional reasoning, it is very likely that they will ignore the new one. However, they at least have noticed the existence of the information.
My questions: how do they process the contradictory information after the reaction? It is commonly said that the person will think about it again, even years of forgotten, and we just need to be patient. But exactly how that process works? What factors will make them ignore it and done, and what factors can trigger the thinking that they are irrational? How would the feeling of being irrational work?
To reduce the number of variables, consider these conditions:
- The information is truly undeniable (the information provides sources they trust (e.g. "Tom agrees with this too"), or links to check)
- There is no reminder from other relationships (no other people they trust talks about this, including Tom)