Some people have this set of behaviors:
Consider preconceived opinions and beliefs correct
Search for or interpret info in a way that confirms preconceptions
Resist info that contradicts present opinions
Tend to believe negative info about other opinions
Feel uncomfortable with changing mindset
Some people have this set of behaviors:
Realize preconceived opinions and beliefs may be incorrect
Search for the truth
Consider a variety of opinions
Recognize bias, propaganda, and spin
Open the mind to the possibility of change
If you have the first set of behaviors, you have confirmation bias.