Cognitive bias is the enemy of critical thinking. It restricts our ability to think rationally and make balanced judgements. Unfortunately, we’re all biased. Our points of view are shaped by our upbringing, our experiences, our ethnicity, where we live, what we choose to read, the people we hang out with, the organisation we work for. Wikipedia lists over 180 cognitive biases we all suffer from. Here’s a few of the most common ones.