As much as it would make the world easier to understand, things like career success and advanced degrees don’t always actually mean someone is intelligent. But that doesn’t mean it’s impossible to identify someone’s mental abilities. We’ve collected interesting and sometimes subtle examples of signs that someone is actually super smart from across the internet, from the ability to communicate with anyone to a superhuman skill at grasping new concepts. Get comfortable as you scroll through, upvote your favorites and be sure to share your own thoughts in the comments section down below.