A long read, but a good one. I&#x27;ve seen the MBTI used in lots of places, and as someone trained in cognitive science, I&#x27;ve always looked askance at it. It&#x27;s tough to think about how we can reduce personality to four axes that are immutable as you grow and change. It&#x27;s an interesting intellectual exercise, but using it in hiring decisions or to do anything other than just provoke some thought is probably a terrible idea.<p>from the end...<p>&quot;More unexpected is what I now know about personality. I know that it occupies some dream state between fiction and a reality. I know that its fictions infiltrate our lives in ways we do not always perceive — every time we decide whether to let a stranger become a friend or a lover, every time we conclude that someone possesses a good personality or a bad one. I know that the reality of personality is inescapable, and that many of the people I met in training will make irrevocable decisions about their lives based on the truths they believe are encoded in four simple letters.&quot;