How do you know someone is very smart? Here are 15 'subtle signs' people notice.
"You can understand both sides of an issue and still think one is wrong."

Steve Jobs shows off iPhone 4 at the 2010 Worldwide Developers Conference.
There is a big difference in how highly intelligent people communicate versus those with smaller IQs. A Redditor named Occyz wanted to know how people tell the difference by asking them to share the “subtle” signs that someone is very intelligent.
The question was a big hit on the forum, receiving over 3,700 responses.
A big takeaway is people think highly intelligent people are mentally flexible. They are always interested in learning more about a topic, open to changing their minds when they learn new information and acutely aware of what they don’t know.
In fact, according to the psychological principle known as the Dunning-Krueger effect, there is a big confidence chasm between highly intelligent people and those who are not. Low-IQ people often overestimate what they know about topics they need to familiarize themselves with. Conversely, people with high IQs underestimate their knowledge of subjects in which they are well-versed.
Here are 15 “subtle” signs that someone is highly intelligent.
1. They admit their mistakes
"When someone can admit a mistake and they know they don’t know everything."
2. Great problem-solvers
"They're very good at problem-solving. Even if it's something they have no experience with they always approach the problem from the right angle."
3. They appreciate nuance
"'I can hold two opposing ideas in my head at the same time.' Anyone who is willing to do that is intriguing to me. Especially with polarizing issues. They might actually be interesting to talk to."
"I like to call it being smart enough to know how stupid you are."
"They struggle with imposter syndrome. Dumb people always think they’re [great]."
The great American poet Charles Bukowski once wrote, “The problem with the world is that the intelligent people are full of doubts and the stupid ones are full of confidence,” and according to science, he’s correct.
“Ignorance is associated with exaggerated confidence in one’s abilities, whereas experts are unduly tentative about their performance,” Stephan Lewandowsky Chair of Cognitive Psychology, University of Bristol, writes for the World Economic Forum. “This basic finding has been replicated numerous times in many different circumstances. There is very little doubt about its status as a fundamental aspect of human behavior.”
6. They ask questions
"They are ok with being perceived as 'stupid' by asking questions — if we hold back in fear, we'll never truly learn. Plus, it's a good way to show others it's ok to question things if you don't understand — better off if we're on the same page instead of hoping things work out without being informed."
7. They love a challenge
"They feel challenged rather than threatened by new things, problems, ideas..."
"'I don't know' is the beginning of a puzzle, not the conclusion."
9. They can simplify big ideas
"Fantastic teachers can make learning nearly effortless."
10. They listen to people they disagree with
"They don't continually need to tell people how intelligent they are."
This idea is backed up by science. A study published by IFL Science found that people who score high on intelligence tests answer easy questions quickly. However, they spend more time on questions complex questions than their less intelligent peers. They have the intelligence to wait until their entire brain has grappled with a problem before answering.
15. They are great storytellers
This article originally appeared last year.
- Five reasons rabbits make the best indoor pets ›
- You may suffer from 'impostor syndrome.' Lots of smart people with signs of high achievement do. ›
- People share the 18 things that are a 'subtle sign' someone is really smart ›
- 5 signs of intelligence commonly mistaken as weaknesses - Upworthy ›
- Steve Jobs' trick to solving problems - Upworthy ›
- 15 'subtle' signs that someone is highly intelligent - Upworthy ›
- 15 'subtle signs someone is super smart - Upworthy ›
- The one sign that someone is highly intelligent, according to philosopher Arthur Schopenhauer - Upworthy ›






A Generation Jones teenager poses in her room.Image via Wikmedia Commons
An office kitchen.via
An angry man eating spaghetti.via 



An Irish woman went to the doctor for a routine eye exam. She left with bright neon green eyes.
It's not easy seeing green.
Did she get superpowers?
Going to the eye doctor can be a hassle and a pain. It's not just the routine issues and inconveniences that come along when making a doctor appointment, but sometimes the various devices being used to check your eyes' health feel invasive and uncomfortable. But at least at the end of the appointment, most of us don't look like we're turning into The Incredible Hulk. That wasn't the case for one Irish woman.
Photographer Margerita B. Wargola was just going in for a routine eye exam at the hospital but ended up leaving with her eyes a shocking, bright neon green.
At the doctor's office, the nurse practitioner was prepping Wargola for a test with a machine that Wargola had experienced before. Before the test started, Wargola presumed the nurse had dropped some saline into her eyes, as they were feeling dry. After she blinked, everything went yellow.
Wargola and the nurse initially panicked. Neither knew what was going on as Wargola suddenly had yellow vision and radioactive-looking green eyes. After the initial shock, both realized the issue: the nurse forgot to ask Wargola to remove her contact lenses before putting contrast drops in her eyes for the exam. Wargola and the nurse quickly removed the lenses from her eyes and washed them thoroughly with saline. Fortunately, Wargola's eyes were unharmed. Unfortunately, her contacts were permanently stained and she didn't bring a spare pair.
- YouTube youtube.com
Since she has poor vision, Wargola was forced to drive herself home after the eye exam wearing the neon-green contact lenses that make her look like a member of the Green Lantern Corps. She couldn't help but laugh at her predicament and recorded a video explaining it all on social media. Since then, her video has sparked a couple Reddit threads and collected a bunch of comments on Instagram:
“But the REAL question is: do you now have X-Ray vision?”
“You can just say you're a superhero.”
“I would make a few stops on the way home just to freak some people out!”
“I would have lived it up! Grab a coffee, do grocery shopping, walk around a shopping center.”
“This one would pair well with that girl who ate something with turmeric with her invisalign on and walked around Paris smiling at people with seemingly BRIGHT YELLOW TEETH.”
“I would save those for fancy special occasions! WOW!”
“Every time I'd stop I'd turn slowly and stare at the person in the car next to me.”
“Keep them. Tell people what to do. They’ll do your bidding.”
In a follow-up Instagram video, Wargola showed her followers that she was safe at home with normal eyes, showing that the damaged contact lenses were so stained that they turned the saline solution in her contacts case into a bright Gatorade yellow. She wasn't mad at the nurse and, in fact, plans on keeping the lenses to wear on St. Patrick's Day or some other special occasion.
While no harm was done and a good laugh was had, it's still best for doctors, nurses, and patients alike to double-check and ask or tell if contact lenses are being worn before each eye test. If not, there might be more than ultra-green eyes to worry about.