Somehow, you are always on the side of science, or so you believe. Yet, strangely, so many intelligent and educated people seem to have opinions differing from your own, even when science herself clearly says that you are correct. They must all be deluding themselves, mustn’t they?
An aquaintace's claim that you cannot judge psychological development stage by linguistic patterns was not based on any empirical science facts, it's not TOTALLY doable, but maybe good enough if one gives it a good try.