It is easy to assume that we know a lot about the world, our country or even our local community. However, in reality we know very little. It is very difficult to estimate things like age or race even in places we know well, much less in entire countries or the world. Our own biases and preconceptions which we are blind to make us unable to know the communities we live in. In his TEDx talk Alan Smith explains the difference between our knowledge and reality. 1. Do you have any experience with statistics? 2. How well do you think you know the area you live in? 3. Have you ever been surprised by a statistic that was wildly different from what you’ve expected? Source: https://www.ted.com/talks/alan_smith_why_we_re_so_bad_at_statistics