Your brain is a liar. A big fat liar. I'm sorry to be the one to tell you this, but it's better you hear it from me than find out the hard way when you're arguing with your sister about what actually happened at Thanksgiving in 1998.Every time you remember something, your brain alters the facts. Just a little. Every single time. It's not trying to deceive you—it's just how memory works. Each recal ...