Intellectual curiosity
High IQ people have a constant true thirst for knowledge -- want to learn more. They share and discuss - have ideas -- they can keep talking until something works. They are not know-it-alls. Whichever one comes up with the key to the puzzle that's solved will - is fine. Doesn't matter which one. More ideas come forth, building upon what they are working on. After a while -- you've got the problem solved to the -- whatever it is they are working on. There's sense of accomplishment..
People communicate in a civil manner to solve problems.