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People share the 18 things that are a 'subtle sign' someone is really smart

"They effortlessly communicate complex concepts in a simple way."

Albert Einstein

One of the strangest things about being human is that people of lesser intelligence tend to overestimate how smart they are and people who are highly intelligent tend to underestimate how smart they are.

This is called the Dunning-Kruger effect and it’s proven every time you log onto Facebook and see someone from high school who thinks they know more about vaccines than a doctor.

The interesting thing is that even though people are poor judges of their own smarts, we’ve evolved to be pretty good at judging the intelligence of others.

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Imagine a classroom with 20 children, four computers, and no teacher. Under those circumstances, do you think the children could teach themselves?

This was educational technology professor Sugata Mitra's theory when he decided to put a computer on the side of a public wall in Delhi, India, 18 years ago.

At the time, he was working in the city for a computer software developer training company. His workplace sat next to a slum. He wondered how the children he saw there everyday would learn to work with tech in the modern age.

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Fu Manchu was on the loose.

Adult male orangutans grow big jowls, like this gentleman from a German zoo. Photo by Oliver Lang/AFP/Getty Images.

Fu was an adult male orangutan who lived in the Omaha Zoo way back in the 1960s.

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My delightful sister, Annie — the Queen of Seeing Through B.S. — posted this image on Facebook the other day:

Image provided by Ben Thomas, used with permission.

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