There's a difference between displays of intelligence and excessive displays of intelligence. A working definition could be that it's excessive when its purpose is to show off rather than to communicate the point at hand. (I think we agree here, just sort of thinking out loud and making sure.)
So obviously it's a bad idea to show off. To me the question really is what do you do when you need to communicate something, but doing so will be seen as excessive. What are the best strategies to mitigate the perceived excessiveness?
So obviously it's a bad idea to show off.
Could you define "showing off"?
I was reading reviews of HPMOR on Goodreads and I noticed that the people who didn't like the book were essentially "put off by the rationality". They thought Harry was arrogant and condescending.
Then I was thinking, a lot of people are "put off by rationality" for similar reasons. What a shame. There's a lot of value in spreading rationality, and this seems to be a big obstacle in doing so.
Any thoughts on how to make people less "put off by rationality"? I think the core issues are: