> Every cognitive bias is there for a reason — primarily to save our brains time or energy. If you look at them by the problem they’re trying to solve, it becomes a lot easier to understand why they exist, how they’re useful, and the trade-offs (and resulting mental errors) that they introduce. [source](https://betterhumans.coach.me/cognitive-bias-cheat-sheet-55a472476b18#.580r2jwti)