If I come across as smart it's probably just because I'm well educated though, which is a different thing from intelligence.
But the ability to become well educated is itself predicated on a general level of intelligence. Where intelligence ends and education begins is not a line that can be drawn anywhere along a cognitive development graph.
And conversations reflect more than just communication skills, they demonstrate ability to draw logical inferences, to compare and contrast, make analogies, apply relevant knowledge, draw on long and medium term memory capabilities, make useful distinctions, understand the implications of what others have said. And everything that you said in this post
I'm not sure that communication skills accurately represents the skills that IQ tests are meant to measure. IQ tests test a measure of certain cognitive functions such as pattern recognition, and calculation abilities. There are a lot of different types of intelligence other than IQ, much as musical, linguistic and kinesthetic, which may be somewhat correlated but generally, people can have higher levels of one type of intelligence without an overall increase in all of them. If I come across as smart it's probably just because I'm well educated though, which is a different thing from intelligence.
clearly suggests that you aren't lacking in any of these capacities.
I am actually a bit skeptical about the idea that an iq test accurately measures this reified thing labelled 'intelligence' placed along a simple number hierarchy.
Iq tests are actually much more about creating a mechanism of social exclusion and population control in institutional settings like schools, the army etc. At least that was their original function.
Yes, the multiple intelligence theory seems more like an accurate reflection of concrete cognitive psychology as it manifests itself in behavior.