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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."

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via Associated Press/Wikimedia Commons

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.

smart people, thoughtful people, intelligence, signs of intelligence, reading, booksA man reading a book in his library.via Canva/Photos

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."

"Agreed but I would add that witty or dark humor is more intelligent than mean, cruel, gross humor. If someone’s 'wit' is just the same structure of putting other people down or being gratuitously shocking or gross, then no."

"A really good sense of humor. To be really funny, you have to be very observant and able to see things in ways that others don’t."

6. They make you feel smart

"They explain some things to you in a way that makes you feel intelligent."

"Einstein said, 'If you can't explain what you are talking about to a six-year-old, you don't fully understand it yourself.'"

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."


thinking, intelligence, being smart, smart people, thoughtful people, consideration, woman, touching chinA woman thinking about her response.via Canva/Photos

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

"I wish people could understand intelligence in many forms—being good with your hands is intelligence. Being able to learn elaborate choreography is intelligence. Being emotionally responsive and understanding microexpressions is intelligence. It’s not just regurgitating facts. I’m a fact regurgitator myself, but I have a lot of respect for things I can’t do."

13. They don't get into drawn-out arguments

"Not raising their voice during a disagreement. Shouting over each other is to try and win an argument with intimidation rather than logic."

"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."

"I remember the first time that I understood that not picking a side was a valid option for many situations. It was like a record skip moment in my head."

15. They use a bidet

"They own a bidet and don’t use toilet paper."

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Stanford researchers find a single question could be the key to changing someone's mind

Curiosity goes a lot further than we might think.

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Photo credit: Canva

How do you get someone to open their minds to another perspective?

The diversity of humanity means people won't always see eye to eye, and psychology tells us that people tend to double down when their views are challenged. When people are so deeply entrenched in their own perspectives they're refusing to entertain other viewpoints, what do we do?

Frequently, what we do falls into the "understandable but ineffective" category. When we disagree with someone because their opinion is based on falsehoods or inaccurate information, we may try to pound them with facts and statistics. Unfortunately, research shows that generally doesn't work. We might try to find different ways to explain our stance using logic and reasoning, but that rarely makes a dent, either. So often, we're left wondering how on Earth this person arrived at their perspective, especially if they reject facts and logic.

According to Stanford researchers, turning that wondering into an actual question might be the key.

discussion, debate, disagreement, conversation, communication, curiosity Questions are more effective than facts when it comes to disagreements.Photo credit: Canva

The power of "Tell me more."

Two studies examined how expressing interest in someone's view and asking them to elaborate on why they hold their opinion affected both parties engaged in a debate. They found that asking questions like, "Could you tell me more about that?” and ‘‘Why do you think that?" made the other person "view their debate counterpart more positively, behave more open-mindedly, and form more favorable inferences about other proponents of the counterpart’s views." Additionally, adding an expression of interest, such as, ‘‘But I was interested in what you’re saying. Can you tell me more about how come you think that?” not only made the counterpart more open to other viewpoints, but the questioner themselves developed more favorable attitudes toward the opposing viewpoint.

In other words, genuinely striving to understand another person's perspective by being curious and asking them to say more about how they came to their conclusions may help bridge seemingly insurmountable divides.

discussion, debate, disagreement, conversation, communication, curiosity Asking people to elaborate leads to more open-mindedness.Photo credit: Canva

Stanford isn't alone in these findings. A series of studies at the University of Haifa also found that high-quality listening helped lower people's prejudices, and that when people perceive a listener to be responsive, they tend to be more open-minded. Additionally, the perception that their attitude is the correct and valid one is reduced.

Why curiosity works

In some sense, these results may seem counterintuitive. We may assume that asking someone to elaborate on what they believe and why they believe it might just further entrench them in their views and opinions. But that's not what the research shows.

Dartmouth cognitive scientist Thalia Wheatley studies the role of curiosity in relationships and has found that being curious can help create consensus where there wasn't any before.

“[Curiosity] really creates common ground across brains, just by virtue of having the intellectual humility to say, ‘OK, I thought it was like this, but what do you think?’ And being willing to change your mind,” she said, according to the John Templeton Foundation.

discussion, debate, disagreement, conversation, communication, curiosity Curiosity can help people get closer to consensus. Photo credit: Canva

Of course, there may be certain opinions and perspectives that are too abhorrent or inhumane to entertain with curious questions, so it's not like "tell me more" is always the solution to an intractable divide. But even those with whom we vehemently disagree or those whose views we find offensive may respond to curiosity with more open-mindedness and willingness to change their view than if we simply argue with them. And isn't that the whole point?

Sometimes what's effective doesn't always line up with our emotional reactions to a disagreement, so engaging with curiosity might take some practice. It may also require us to rethink what formats for public discourse are the most impactful. Is ranting in a TikTok video or a tweet conducive to this shift in how we engage others? Is one-on-one or small group, in-person discussion a better forum for curious engagement? These are important things to consider if our goal is not to merely state our case and make our voice heard but to actually help open people's minds and remain open-minded in our own lives as well.

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Woman is shocked after learning the gross hygiene technique people use to make their spray tans last

"Absolutely insane."

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Photo credit: Canva
Woman is disgusted after learning the truth behind lasting spray tans.

Spray tans are seemingly the perfect answer for people who want a summer glow year-round. Not only is the application time quick (some take as little as 5 minutes), sprays tans also deliver sun-kissed skin without excessive UV exposure, essential for reducing the risk of skin cancer and premature excess wrinkles.

If you've never had a spray tan before, you may have lots of questions like: how long does a spray tan last? How do you care for your skin after getting a spray tan? And how can you make your spray tan last longer?

These are exactly the queries a woman on TikTok named Miss Redacted had after getting her first spray tan. But when given the instructions for how to extend the life of her spray tan through "proper care," she was left flabbergasted.

Spray tan aftercare

Spray tans take time to "develop" on the skin, so she was not surprised to receive the rundown on making sure her skin remained glowingly sun-kissed for as long as possible. What she wasn't expecting was the lack of care. Or maybe the better description would be the lack of hygiene required to maintain her newly tanned skin.

"Recently I got a spray tan for the first time because I really like being tan but I don't want to have wrinkles later because I'm obviously very vain. So I went the first time and I expected that I wouldn't be able to shower normally for the first 12-24 hours, and that didn't bother me that much because I'm like, okay, I understand the tan has to set in. I can be gross for a half a day, a day max, whatever, it's not that serious," Miss Redacted says before explaining the woman who did her spray tan began talking her through the process.

- YouTube www.youtube.com

The confused woman recalls a roommate in college who used to get spray tanned all the time as she put the pieces together on hygiene and spray tans. She tells the person doing her spray tan that she generally showers twice a day using soap and a silicone scrubber to wash her entire body, to which the spray tan artist immediately tells her not to use the scrubber on her body because it will take her tan off.

"I was like, 'Oh so don't use it the first shower?' and she was like 'No, like not at all.' And I was like 'What should I use instead of that?'" the first-time customer explains.

She was shocked to hear the artist tell her that she needed to switch to a washcloth and only use it to wash her, "underarms, your bikini area, and under your bra line." Again, Miss Redacted clarifies that means for the first shower only, but the artist reiterates not to put soap on your body "at all" for the first shower, only using a washcloth in the areas she previously mentioned. Once again, the woman was dumbfounded and asks again, what the spray tan artist means.

spray tan spray tans, spray tanning, fake tan, how long do spray tans last A woman gets a spray tan applied to her skin.Photo credit: Canva

"Because I got down this rabbit hole, I started reading about it on Reddit and some of the ways that girls were saying they maintained their spray tans is absolutely insane. Absolutely insane. Like y'all need a bath. Y'all need a...actually a hose down. Let's like put you in the yard with some Dawn, like you're one of the ducks in an oil spill. I think that's what's needed at this point," the woman jokes before clarifying that she doesn't think every woman getting spray tanned is avoiding bathing.

But when it comes to the ick factor over the ones who have been skipping the shower for weeks at a time, the woman isn't the only one feeling the heebie jeebies. Commenters are also shocked and a little grossed out.

This article originally appeared two years ago. It has been updated.

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Her groundbreaking theory on the origin of life was rejected 15 times. Then biology proved her right.

Lynn Margulis had the audacity to challenge Darwin. And we're lucky she did.

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Facts That Will Blow Your Mind/Facebook

A photo of Lynn Margulis.

Throughout her prolific and distinguished career, biologist Lynn Margulis made several groundbreaking contributions to science that we take for granted as common knowledge today. For example, she championed James E. Lovelock’s “Gaia concept,” which posited that the Earth self-regulates to maintain conditions for life.

But by far, her most notable theory was symbiogenesis. While it was first written off as “strange” and “aesthetically pleasing” but “not compelling,” it would ultimately prevail, and completely rewrite how we viewed the origin of life itself.

In the late 1960s, Margulis wrote a paper titled "On the Origin of Mitosing Cells," that was quite avant-garde. In it, she proposed a theory: that life evolved through organisms merging together to become inseparable.

In essence, cooperation is the driver of life, not competition and domination. This directly went against Darwin’s “survival of the fittest” principle that was considered gospel in scientific circles. Margulis’ paper was rejected by fifteen journals before getting accepted into the Journal of Theoretical Biology.

- YouTube www.youtube.com

Time would be on Margulis’ side, however. By the late ‘70s and early ‘80s, research proved that the two major building blocks of plants and animals, chloroplasts and mitochondria were at one time independent bacteria. This solidified the fact that on a biological level, connection trumps autonomy for longevity. And now that fact is written in textbooks, with no real story of the adversity it overcame to get there.

While it is customary for most new scientific theories to be met with criticism, especially those that completely shift the current narrative, many have noted that sexism played a key part in Margulis’ initial lack of acceptance. On more than one occasion, she herself had hinted that women were seen as mothers and wives first, and scientists second. She recalled that while married to fellow scientist Carl Sagan that “Carl would finish his sentence, unperturbed” while she was expected to “handle all the duties of a 1950s housewife, from washing dishes to paying the household bills.”

And yet, Margulis would have other ideas that were controversial that had nothing to do with her gender. Most famously, she did not believe that AIDS was caused by HIV, and instead believed it was cause by a syphilis-causing type of bacteria, despite there already being decades of research proving otherwise. That view was seen as an endorsement of AIDS denialism, which undermined prevention and treatment effort. Then later in life, Margulis became a vocal proponent of 9/11 conspiracy theories suggesting government involvement the in Twin Towers attacks.

And yet, perhaps this is one of those “you gotta take the good with the bad” situations. Margulis’ inherent contrarian nature gave us both these unfounded, even harmful stances, in addition to entirely new paradigms that altered our understanding of life itself.

And if nothing else, it illuminated the need for science to include multiple points of view in order to unlock the truth. It seems life is, after all, about coming together.

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On this American island, residents speak a beautifully unique blend of Southern and Old English

Sadly, the one-of-a-kind dialect may soon be extinct.

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BBC Global/YouTube

An isolated island called Ocracoke is home to a unique dialect not found anywhere else in the world.

American accents are a ton of fun, and they're far more varied than most of us even realize. For example, the Baltimore dialect shares some dialectical DNA with the accent you find in other Northeastern cities like Philadelphia. Baldamor, hon! There's the New England dialects, most famously the Boston accent: Pahk the cah at Havahd yahd! The New York accent is world famous, as is the deep Southern twang, which gives way to a thick Cajun accent the closer you get to the water in Florida and Louisiana. These are all different versions of the greater American dialect.

But there is one place, a tiny island off the coast of North Carolina, where a few residents speak in such a unique way that it's not even identified as American by most people around the world. If you thought you'd heard it all, wait until you get an earful of this one.

Ocracoke, North Carolina, is home to a unique dialect called the Brogue: A strange blend of American Southern, Old Elizabethan English, with little bits of Irish and even Australian thrown in.

island, ocracoke, north carolina, southern, old english, language, outer banks, accents, dialects The Ocracoke light station.Kari Nousiainen/Flickr

The Brogue, also known as Hoi Toider, is absolutely fascinating to hear in action. When you watch interviews with the locals of the island, they at first appear to be speaking a form of deep American southern—you can hear the twang the way you might in parts of Georgia of Alabama.

But then, without warning, a word or phrase will slip out that sounds distinctly British. Old English even. Then you'll swear you hear a bit of Irish.

- YouTube www.youtube.com

The dialect owes its roots to a surprising source: Pirates.

Pirates loved to hide out on Ocracoke as the island is incredibly remote, about 20 miles from the mainland of North Carolina. Even today there are no bridges or flights to Ocracoke; it can only be reached by a (quite lengthy) boat ride. Eventually, the island was actually purchased by the Blackbeard's quartermaster (yes, that Blackbeard), William Howard, where he created something of a pirate settlement. English sailors and Native American tribes also passed through and had their own unique impact on the culture and developing language of the island.

In case have your doubts about the island's buccaneerish roots: "In one popular island legend, Ocracoke comes from the phrase, 'Oh, crow cock,' which was spoken by the infamous pirate Blackbeard as he waited to do battle at sunrise with the governor’s forces that had come to capture him," writes a guide from NC State University.

The dialect had a lot of room to develop without much outside influence. The BBC's Brian Carlton writes, "Howard's community lived in near-isolation for almost two centuries. Electricity didn't arrive at the island until 1938 and a ferry service didn't start until 1957, leaving the islanders cut off except for the occasional supply trip to the mainland."

That's why Hoi Toider is still alive to this day, although its speaking population has dwindled.

Here are a few hallmark phrases of the unique dialect:

  • A "dingbatter" is anyone not from the island; a tourist.
  • An "O'Cocker" is anyone born on the island of Ocracoke.
  • A "buck" is a good male friend, while a "puck" is a female friend.
  • The Brogue uses "weren't" liberally for singular nouns ("The sun weren't out yesterday.") and frequently adds an "a" in front of verbs. ("We went a-fishin' this morning.")

But to fully appreciate Hoi Toider, you've got to hear it in action:

- YouTube www.youtube.com

Experts say that as awesome as the Brogue is, it will likely disappear within the next 50 years.

Though the island remains about as remote as it comes, in 2025 there's no escaping the influence of social media, television, and film. Every generation born on the island is a smidge less-adoptive of the Brogue than the one that came before.

It will probably be mostly gone in the next couple of generations, which feels like a tragedy. Instead of "dingbatter" and "buck," the kids will be saying "Skibidi toilet" and "rizz." OK, maybe that's an exaggeration, but young people growing up on the island won't be as immersed in the language as their elders and will begin to speak more and more like your average American.

- YouTube www.youtube.com

There's a concept called culture homogenization.

It's the idea that over time, because of technology and globalization, unique individual cultures from around the world will all start to look more and more the same. It's why you see fast food restaurants directly next to the Leaning Tower of Pisa and people all over the globe listening to the same handful of musical artists.

island, ocracoke, north carolina, southern, old english, language, outer banks, accents, dialects The Ocracoke ferry.Kari Nousiainen/Flickr

Ocracoke has managed to hang on longer than most places due to how difficult it is to reach. Here's hoping that the Ocracoke Brogue can survive somehow, some way, in little pockets of the island. It's just too dang cool and interesting to go away just yet.

This article originally appeared last year. It has been updated.

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Neuroscientists say a simple trick will help you learn any new skill a lot faster

Learning a new skill? Here's how to quickly level-up.

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via Andrea Piacquadio/Pexels

A woman learning how to play guitar.

Learning a new skill, such as playing an instrument, gardening, or picking up a new language, takes a lot of time and practice, whether that means scale training, learning about native plants, or using flashcards to memorize new words. To improve through practice, you have to perform the task repeatedly and receive feedback so you know whether you’re doing it correctly. Is my pitch correct? Did my geraniums bloom? Is my pronunciation understandable?

However, a new study by researchers at the Institute of Neuroscience at the University of Oregon shows that you can speed up these processes by adding a third element to practice and feedback: passive exposure. The good news is that passive exposure requires minimal effort and is enjoyable.

"Active learning of a... task requires both expending effort to perform the task and having access to feedback about task performance," the study authors explained. "Passive exposure to sensory stimuli, on the other hand, is relatively effortless and does not require feedback about performance."


woman reading, woman book, young woman, studying, new skills A woman reading a book.via Canva/Photos

How to pick up new skills faster?

So, if you’re learning to play the blues on guitar, listen to plenty of Howlin’ Wolf or Robert Johnson throughout the day. If you’re learning to cook, keep the Food Network on TV in the background to absorb some great culinary advice. Learning to garden? Take the time to notice the flora and fauna in your neighborhood or make frequent trips to your local botanical garden.

If you’re learning a new language, watch plenty of TV and films in the language you are learning. The scientists add that auditory learning is especially helpful, so listen to plenty of audiobooks or podcasts on the subject you’re learning about.

But, of course, you also have to be actively learning the skill as well by practicing your guitar for the recommended hours each day or by taking a class in languages. Passive exposure won't do the work for you, but it's a fantastic way to pick up things more quickly. Further, passive exposure keeps the new skill you're learning top-of-mind, so you're probably more likely to actively practice it.

What is passive exposure?

Researchers discovered the tremendous benefits of passive exposure after studying a group of mice. They trained them to find water by using various sounds to give positive or negative feedback, like playing a game of “hot or cold.” Some mice were passively exposed to these sounds when they weren't looking for water. Those who received this additional passive exposure and those who received active training learned to find the water reward more quickly.

gardening, woman gardening, gardening shears, leaning gardening, weeds A woman tending to her garden.via Canva/Photos


“Our results suggest that, in mice and in humans, a given performance threshold can be achieved with relatively less effort by combining low-effort passive exposure with active training,” James Murray, a neuroscientist who led the study, told University of Oregon News. “This insight could be helpful for humans learning an instrument or a second language, though more work will be needed to better understand how this applies to more complex tasks and how to optimize training schedules that combine passive exposure with active training.”

The one drawback to this study was that it was conducted on mice, not humans. However, recent studies on humans have found similar results, such as in sports. If you visualize yourself excelling at the sport or mentally rehearse a practice routine, it can positively affect your actual performance. Showing, once again, that when it comes to picking up a new skill, exposure is key.

The great news about the story is that, in addition to giving people a new way to approach learning, it’s an excuse for us to enjoy the things we love even more. If you enjoy listening to blues music so much that you decided to learn for yourself, it’s another reason to make it an even more significant part of your life.

- YouTube www.youtube.com

This article originally appeared last year.

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