Malcolm Gladwell's book "Blink" discusses how first impressions and snap judgments, referred to as "thin-slicing", can often be as accurate as more carefully reasoned decisions. The book uses examples like an art expert immediately identifying a fake statue based on a quick glance, and a psychologist who can analyze married couples' relationships from brief observations. While thin-slicing can be effective, Gladwell also shows how too much information or making judgments outside your expertise can lead you astray. Overall, the book argues rapid cognition is an ability that can be developed through understanding and controlling your first impressions.