I am thinking about the possibility of "mixed types" in that a given person may act in ways primarily associated with two (or more) different types.
Taking myself as the easiest example. Though I look ENTP, and think ENTP, I tend to act INTP around strangers or when I simply don't see anything worth saying. I will be very cold and formal. Is this normal for ENTPs? I was under the impression that in new company they are at least not the most quiet in the bunch, as I frequently am. To be fair, I will have random bursts of confidence and inspiration that lead me to have ridiculous conversations with people for the sake of fun, which seems pretty ENTP to me.
Of course, there are all kinds of details being left out regarding the various ways people may act depending on their life experience, mental health, intelligence, etc., but I don't really want to go into all that detail.