(sorry the answer was wrong and im new so i dont know how to delete answers)
There are many factors that can make recognizing a bias hard, but one of them is if we have the same bias.
Say for example, that one person thinks that taller people are smarter and they listen to a speech that makes the same statement - they can then think that it's just confirming what they know, and can be a real fact instead of their bias. This will make it harder for them to recognize the bias.
Repeated all the time and sometimes writ it down to help remember it
The first shots of the Civil War were fired at Fort Sumter.
Yes, socialization is segregation based on informal norms.