A couple of points: - The types do not indicate the degree of tendency in each axis. That can vary within a type and isn't captured by the type code at all. Th

A couple of points: - The types do not indicate the degree of tendency in each axis. That can vary within a type and isn't captured by the type code at all. The types just indicate the direction. There is some evidence that children tend to have more extreme preferences which balance out people mature. - Have you seen Daniel Kahneman's Thinking Fast and Slow? The "fast" and "slow" thinking described there is very similar to what the MBTI calls "perception" (fast) and "judgement" (slow). And notably those categories do have strong evidence of an innate tendency which remains consistent over time (but only if you don't bias the participant by asking them to approach the task in certain way indicating that this tendency can be overridden by the appropriateness of certain thinking mode to the task at hand)