How do you know someone is incredibly intelligent? Here are 15 'subtle signs' people notice.
"They can change their mind when presented with new information."

Albert Einstein using a blackboard.
Highly intelligent people come in all types. Some have no problem bragging about their smarts or accolades, while others are more humble because they don’t need to call attention to their brilliance. However, without tooting their own horn, certain hallmarks of intelligence are noticeable in how they approach people and situations. It seems that having a big brain is a hard thing to hide.
One of the undeniable characteristics of someone very intelligent is that they exhibit mental flexibility. They change their opinions when they don’t have enough information on a topic and can apply what they’ve learned from one subject to another. They also tend to have a great sense of humor, proving that their brain can easily connect different ideas.
A Redditor asked people on the ProductivityCafe subforum to share the “subtle signs that someone is intelligent.” It created great conversations about the characteristics of intelligent people and how their smarts seem to influence every part of them, from their personality to their ability to avoid unnecessary conflict.

Here are 15 subtle signs that someone is very intelligent.
1. Curious about multiple subjects
"They like to learn about any and everything."
"And remember details and concepts later. A desire to understand and curiosity about the subject at hand."
2. They change their minds
"They can change their mind when presented with new information."
"This is definitely the best / most noticeable answer. Intelligent people agnostically process new information. They don’t just “automatically” deny anything that they don’t know or is inconsistent with what they already know. Intelligent people - it’s not what they know, it’s how they interpret / process new information."
"As John Nash, the mathematician allegedly once said; when the facts change, I change my mind!"
3. They process humor quickly
"They get the joke sooner than most people. Happens once in a while in movies or group settings: one person starts to laugh way ahead of everyone else. That’s one with a super fast processing mind (I know one). It is totally unconscious, so cannot be faked."
4. They like being corrected
"When you correct them, they're actually happy about it because they get to learn something new."
"100%. This is often referred to as growth mindset."
5. Great sense of humor
"Humor is a marker for intelligence. Truly dumb people aren’t funny."
6. They make you feel smart
"They explain some things to you in a way that makes you feel intelligent."
7. They think before they respond
"They don't react. There is always a delay... and then, they respond."
"They observe, they pause, and then comes the long encyclopedic reply."

8. They know when to be quiet
"Yes, I have come across people with no filter, and have to argue about everything, and that can be exhausting."
"Never miss a good opportunity to shut the f**k up."
9. They're great at banter
"Yes, and quick word play/good puns."
10. They ask about your thought process
"If someone is inquisitive. They want to know how and why you think the way you do. Most people don’t do this."
11. They know what they don't know
"Even very intelligent people don't know about every topic. They understand this and don't pretend to be an expert or speak to things they don't specialize in. Or they use analogies to connect it to things they do understand.They understand that there is a lot they do not know, especially about their given specialties."
"Some people have so much ego, that they have an inability to say that they don’t know the answer to a question. They’ll either give a bullsh*t answer, or try to shrug off the patient’s concerns entirely. Nobody knows everything. If you don’t know, there’s no fault in admitting that, and then using resources to find the answer."
12. Physical intelligence is important, too
13. They don't get into drawn-out arguments
"Argue with an idiot and there's two idiots."
14. They think for themselves
"They don’t have herd mentality. Specifically in politics, religion, and pseudoscience."
15. They use a bidet
"They own a bidet and don’t use toilet paper."
- People share the 18 things that are a 'subtle sign' someone is really smart ›
- What are the 'non-obvious' signs someone is super smart? Here are 15 that people notice. ›
- 5 things that people view as signs of 'stupidity' that are actually signs of intelligence ›
- How do you know someone is very smart? Here are 15 'subtle signs' people notice. ›
- The two signs someone is incredibly intelligent, according to Schopenhauer - Upworthy ›
- These 10 'Weird' habits might indicate high intelligence - Upworthy ›





A Generation Jones teenager poses in her room.Image via Wikmedia Commons
An office kitchen.via
An angry man eating spaghetti.via 
Gif of baby being baptized
Woman gives toddler a bath Canva


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.