Hi Rory, I had to read your post a couple of times to try and work out where you were coming from coz it seemed like you were just stating the obvious here.
It took a couple of read throughs for me to conclude that stating the obvious was exactly what you were doing mate.
Even after acknowledging some areas of the world are relatively uneducated, it has no impact whatsoever on the question being posed.
You say my question is limited and your reasoning for this is merely acknowledging some people are not as educated as others ........ And ????
The exceptions you identify are absolutely, 100% academic here and have zero relevance to the question posed.
I'm sorry if I have misread your post mate but that's what it seems like to me.
Yep dull day on the market yesterday and was purely making a statement to the question posed, but it is subjective so an 'answer' to the question is not necessarily availabe in my opinion. But after a good nights sleep I will move further with my thoughts on it.
To look at your question in the raw, you ask can we determine someones intelligence by disecting their use of language, well generally, yes. In my line of work, you do meet some very articulate people, but if they have hoodwinked their employer with grandiose language papering over the cracks in their actual abilities, they are soon found out. But this can only be done after a period of time, when we finally draw our conclusions about someone with a proper analysis of their input or contributions to subjects.
On the reverse side of this, it can be abundantly clear in a short space of time that sometimes, a great brain is not backed up by communicative skills. But we look at the results in front of us when we interact with those people and we know quite quickly.
But then we have to look at the part of your question, what do we class as intelligence, the ability to debate? Mathematical genius? Or do we have to accept that intelligence is a very broad term that has no singular definition?
Frankly, yes we do, as people do excel in different areas, a general level of intelligence of a broad number of subjects can be measured to some degree, but it will never be a true reflection of the individual.
In conclusion, your question has no definitive answer, but we can say yes, language is no hiding place for the intellectually challanged, a look at politicians generally will prove this point in the real world!