Sometimes it doesn't matter what your IQ level is as long as you can make the right impression.
Some tricks will help you master this art.
Which people seem more intelligent and educated to us?
Ideal speech
It immediately seems that we are dealing with a real intellectual, who has more than one higher education behind him. It seems that such people spend all their free time reading books and watching scientific programs.
Logical thinking
To be objective, a very small percentage of people can debate without resorting to shouting down their opponent or getting personal. Such people don't seem particularly intellectually developed.
If you master the art of logical thinking, use logic and operate with facts, then you will seem much smarter than those around you.
Laconic
If you speak only on the merits, then every word you say seems more valuable. The opinion of such people seems balanced, thoughtful and correct.
So try not to talk too much.