“All models are wrong but some are useful” - statistician George Box I was startled this morning by my friend Todd's (not his real name) example of how personality tests are reductive and unreliable. According to the Enneagram, his personality type tends to avoid emotionally charged situations. Todd then cited a recent instance where he encountered a crying coworker in the elevator and instead of walking away, he approached her and listened to what was going on. He easily stepped outside the box of his personality type: Todd 1, Enneagram 0. Contrary to common perception, the Enneagram is not witchcraft. It has some Christian roots . The problem with personality tests like Myers-Briggs, 16PF, and DISC assessment is some people swear by them and these fanatics tend to see everyone and everything through the lens of the test, often in reductionistic and deterministic ways. So in a conversation, I might say “I ate too much last night and I fe...