When we have already created ideas about something and if these ideas are not supported by real facts, then we say that we have prejudices. Prejudice is formed opinions and does not represent a high self-esteem, since we refuse to face the real facts that might change our conviction, and accept that we were wrong. Thus, refusing to accept and consider the potential evidence that would show us that we were wrong, and yet caused a conflict in us, is the lack of critical thinking.