[0xcde4c3db]

I can't speak for Density, but systems that divide people into discrete types are almost always bullshit. At best there's still a small minority who don't actually fit into any type, even roughly (unless the "types" are just a quantized version of a measured dimension, as with the classic quintile-based terms for economic classes). It's fairly common in business settings for managers to buy into one or more of these despite their being bullshit, so the fact that it's used is not much of a qualification.

I'm not saying that there's no such thing as opposing traits, but as far as I know the validated descriptions use continuous dimensions rather than assigning people to corners.