>>346996013
Do you also think the world is flat and quantum mechanics is just hippy crap because it only has wild cosmic theories to explain it?

Your bar for "bullshit" is retarded if you don't think there are introverts and extroverts. There is nothing more empirical in psychology. Not even memory or cognitive biases are as well understood as these traits. They've been objectively proven to exist through factor analysis and clinical study for over a century.