They make no sense, they don't fit most people and people come up with dumb reasons to type people as certain things. I.e "You have inferior Fe" or whatever. Really the 1st and 2nd function are the only ones that matter when determining type. I'm tired of this stupid crap. Watch an INFP and INTJ coffee video. It's the dumbest thing I've ever seen in my life. That's another thing. Can we stop using these stupid little observations to type people? Yes, some behaviors indicate certain functions but people seriously overthink it. "I must have Ne cause I always have multiple tabs open at once" stupid shit like that.