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Thinking Thursday – When we know less than we think

We often mistake familiarity for understanding. In this fourth edition of Thinking Thursday, we explore why the illusion of knowledge is more dangerous than ignorance — and what to do about it.

Thinking Thursday – When we know less than we think

Something to think about

We live in a world full of information. Articles, videos, explainers, and podcasts. But does that mean we understand more — or just feel like we do?

The truth is, people often believe they understand things far better than they actually do. It’s called the illusion of explanatory depth.

Ask someone how a toilet flushes, or how inflation works, or why birds migrate — and they’ll feel confident… until they try to explain it.

That discomfort — the gap between what we think we know and what we can actually explain — is a clue. It reveals where our thinking is weak. And it’s not a failure. It’s a signpost.

As the philosopher Daniel Dennett put it:

“If you can’t explain something clearly, you don’t really understand it.”

Real thinkers don’t cling to the appearance of knowledge. They dig. They test. They clarify.

They don’t say “I already get it.”

They say: “Let’s see if I really do.”

Something to try

Pick something you believe you understand well — and try to explain it to a child.
Not vaguely, not with jargon, but simply and clearly.

If you can’t do it? That’s not weakness.

That’s your mind asking for more.

Something to read

A recent post you might enjoy:

Why Smart People Fall for Stupid Ideas | Thinklier
Even Nobel Prize winners fall for nonsense. Discover why intelligence isn’t enough to protect us from bad ideas — and what really helps us think clearly.


We assume intelligence protects us from bad thinking. But the illusion of knowledge can make us even more vulnerable — unless we learn to spot it.


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See you next Thursday.
The Thinklier team