Powerful ideas from top nonfiction
Try Blinkist to get the key ideas from 7,000+ bestselling nonfiction titles and podcasts. Listen or read in just 15 minutes.
Start your free trial
Blink 3 of 8 - The 5 AM Club
by Robin Sharma
Listen to the Intro
The Knowledge Illusion summary
Steven Sloman & Philip Fernbach
Why We Never Think Alone
31 mins
Brief summary
"The Knowledge Illusion" by Steven Sloman and Philip Fernbach explores how we think and what we know, arguing that we rely heavily on other people and the internet to fill gaps in our understanding. This enlightening book shows that our individual knowledge is actually a collective illusion.
Topics
Table of Contents
The Knowledge Illusion
Summary of 11 key ideas
Audio & text in the Blinkist app
Key idea 1 of 11
The illusion of explanatory depth causes us to think we know more than we actually do.
You can probably ride a bicycle. Most people can – after all, it’s a pretty straightforward activity. Once you master the balance part, simply hop on, push the pedals and off you go. So it stands to reason that you could explain how a bicycle works, right?
Well, you might be surprised. Here’s the thing: people have a habit of overestimating how much they know about how things work, even when they don’t know much at all. This gap between assumed understanding and actual knowledge is called the illusion of explanatory depth, or IoED, for short.
To get an idea of how the IoED works, let’s return to the matter of bikes.
At the University of Liverpool, a psychology professor named Rebecca Lawson put her students’ knowledge to the test by handing out copies of a drawing. It depicted an incomplete bicycle, which lacked, among other parts, a chain, pedals and sections of the frame. She then asked her students to complete the drawing.
The resulting drawings varied in accuracy. One had two sets of pedals; another lacked crucial parts of the frame. Few would have fared well on the open road.
This led the students to an uncomfortable realization: they were unable to articulate knowledge that they’d been sure they possessed, and their understanding was in fact quite shallow. That’s the IoED in a nutshell.
How a bicycle works is just one of many things that people, when put to the test, have difficulty explaining. Other tests have revealed that people overestimate their knowledge of all sorts of everyday objects, from zippers to toilets to wristwatches. Indeed, people tend to overestimate their knowledge of everything.
The inevitable conclusion to be drawn from this fact? People don’t know as much as they think they do.
This leads us to a question that bedeviled early cognitive scientists: how much do we know?
Want to see all full key ideas from The Knowledge Illusion?
Key ideas in The Knowledge Illusion
More knowledge in less time
Read or listen
Get the key ideas from nonfiction bestsellers in minutes, not hours.
Find your next read
Get book lists curated by experts and personalized recommendations.
Shortcasts New
We’ve teamed up with podcast creators to bring you key insights from podcasts.
What is The Knowledge Illusion about?
The Knowledge Illusion (2017) is an in-depth exploration of the human mind. It argues against the view that intelligence is solely an individual attribute, offering compelling arguments for how our success as a species would have been impossible without a community of knowledge.
Best quote from The Knowledge Illusion
A good story has a moral that applies not just to this world but also to other worlds that we might find ourselves in.
—Steven Sloman & Philip Fernbach
Who should read The Knowledge Illusion?
- Students of cognitive science
- Know-it-alls
- Aspiring intellectuals worried that they know too little
Categories with The Knowledge Illusion
Book summaries like The Knowledge Illusion
People ❤️ Blinkist
Sven O.
It's highly addictive to get core insights on personally relevant topics without repetition or triviality. Added to that the apps ability to suggest kindred interests opens up a foundation of knowledge.
Thi Viet Quynh N.
Great app. Good selection of book summaries you can read or listen to while commuting. Instead of scrolling through your social media news feed, this is a much better way to spend your spare time in my opinion.
Jonathan A.
Life changing. The concept of being able to grasp a book's main point in such a short time truly opens multiple opportunities to grow every area of your life at a faster rate.
Renee D.
Great app. Addicting. Perfect for wait times, morning coffee, evening before bed. Extremely well written, thorough, easy to use.
People also liked these summaries
4.7 Stars
Average ratings on iOS and Google Play
29 Million
Downloads on all platforms
10+ years
Experience igniting personal growth