[owensmartin]

Wonderful. The concept of falsifiability is a gift Karl Popper gave to humanity, and we mustn't forget it.

So from a statistical standpoint, you're estimating theta, some parameter that indicates your level of extroversion. What does this parameter get you? Will you then predict this person's success in life? Why would you want to do that?

Much worse, could you possibly point to this untestable parameter as being the _cause_ of one's success? Hardly.

But from an epistemological standpoint, there is some benefit to identifying what we take to mean intro/extroversion. So that's why we give Jung credit, but more as a philosopher and less as a scientist.