Cognitive bias affects us all. Even though we can fact-check information using phones and computers, we still fall for fake news and cling to outdated opinions. Why? When our cognitive biases take control, our ability to make logical judgments is limited, and facts take a back seat to deeply held beliefs. Scientists theorize that some cognitive biases have evolutionary roots, helping us maintain social connections. This mattered in prehistoric times when being isolated meant almost certain death. These days, cognitive biases still influence our choices — not to mention politics and elections. In this lesson, students will learn about five of the most common types of cognitive bias and ways to recognize and respond to them.