" He also found he made mistakes in handling complexity. A good decision requires looking at so many different features of companies in so many ways that, even without the cocaine brain, he was missing obvious patterns. His mental checklist wasn’t good enough. “I am not Warren,” he said. “I don’t have a 300 IQ.” He needed an approach that could work for someone with an ordinary IQ. So he devised a written checklist. "

― Atul Gawande , The Checklist Manifesto: How to Get Things Right