I am an argumentative type, yes (I don't mean socionics type, just in general).
I don't take it for granted, no, but you asked about how there is correlation, so I linked to the relevant description. You assume a bit too many things about me.Claiming you don't take Socionics as granted for sure and linking to a description of Socionics theory to back up your own statement.
That sounds like MBTI now. That's a different theory.Besides from this the confussion might also be the interpretation of the meaning of conscientiousness.
Internal judgement is more about consistency or invariance
External judgement is more about conscientiousness.