No Curiosity Whatsoever
People that never ask questions or are not curious can seem disinterested. Here's the thing, they really aren't interested because they don't posses the capacity to be.
Pointing Out “Big” Words
There is nothing more irritating than when people make fun of the way you speak. However, it could be a sign of low intelligence, when they make fun of you using more academic vocabulary.
Having Main Character Syndrome
Some people like to assume they're the main character in life. They act like a television show and the entire universe revolves around them. Spoiler alert: it doesn't.
Ignoring Facts That Don't Fit Their Narrative
By definition, a fact is something that is known or proven to be true. By ignoring facts because they don't fit your belief or narrative, you're demonstrating signs of low intelligence.
Taking Everything As A Threat
We promise that the world isn't out to get you. There is no gigantic conspiracy against you; you're not George Costanza. The universe is not against you, as he once infamously said.
Constantly Getting Into Public Arguments
We've never understood why people get into shouting matches in public places. Who are you trying to impress here?