Well, the theory is just a background. It's sort of like where people use a black light to search through the dark and eventually certain things become more apparent. kind of. Like, ok, I know these premises, etc. etc. and these traits apply here. But you have to actually see it. Then you really know. And functions are very integral things, so their manifestations won't be perturbed by peoples' transient moods, acts, etc. (i.e. some ESTj machismo trying to act "Se"). Actually the black light thing makes sense. Because it's not as if you're blindly searching in the dark; you have the light as a sort of general support tool thing. But it's also sort of about letting the patterns evince themselves.