Confirmation bias is the emotional and mental experience that we have based on our beliefs. Unconsciously, we say to ourselves, “This information is true because it reinforces my beliefs.” On the other hand, we will unconsciously say to ourselves, “This information is false because it conflicts with my beliefs.” Different beliefs and ideologies between people and groups of groups create conflict. Shared beliefs create trust and loyalty. Groups of people with shared beliefs are the foundation for political parties, religious groups, family bonds, sports fan bases, national loyalty, friendships, and any other cohesively committed group. We feel safe around people who agree with our thinking. Ideas that are inconsistent with our group belief makes us feel threatened. We trust people who tell us what we believe.
Confirmation bias can easily block critical thinking.