Squeeze the dots. Every observation of a person potentially tells you something valuable about how they operate. As I explained earlier, I call these observations “dots.” A dot is a piece of data that’s paired with your inference about what it means—a judgment about what someone might have decided, said, or thought. Most of the time we make these inferences and judgments implicitly and keep them to ourselves, but I believe that if they are collected systematically and put into perspective over time, they can be extremely valuable when it’s time to step back and synthesize the picture of a person.

Don’t oversqueeze a dot. Remember: A dot is just a dot; what matters is how they add up. Think of each individual dot as an at-bat in baseball. Even great hitters are going to strike out many times, and it would be foolish to evaluate them based on one trip to the plate. That’s why stats like on-base percentage and batting average exist. In other words, any one event has many different possible explanations, whereas a pattern of behavior can tell you a lot about root causes. The number of observations needed to detect a pattern largely depends on how well you get in sync after each observation. A quality discussion of how and why a person behaved a certain way should help you understand the larger picture.
