Sign In
Subscribe
By Natural Philosopher Michael Alan Prestwood
By Natural Philosopher Michael Alan Prestwood
Sign In
Subscribe
Science    Philosophy  •  Critical Thinking  •  History    Politics  •  RW  •  AI  •  Physics

1-MINUTE HOT TOPIC

What is the Ebbinghaus Illusion?

By Michael Alan Prestwood

Author and Natural Philosopher

Follow On Facebook and Youtube!
Articles: 
Videos: 
Elusive Illusions
Four Mind Traps < TST Framework < Critical Thinking
Share :
Email
Print

What is the Ebbinghaus Illusion?

The Ebbinghaus Illusion plays with how our minds perceive size relative to surroundings. Imagine two identical circles. Surround one with larger shapes and the other with smaller ones. The circle surrounded by smaller shapes appears bigger, even though they’re the same size. This illusion highlights how context can warp our perception. It’s why you might seem taller standing next to shorter people, regardless of your actual height.

This concept isn’t new. Ancient skeptics like Pyrrho observed similar phenomena and used them as a cautionary tale about trusting appearances. Pyrrho’s philosophy boiled down to “do not trust until you verify,” contrasting with the empirical approach of “trust but verify.” For skeptics, illusions like this are a reminder to question not only new claims but also the beliefs and assumptions we take for granted.

The Ebbinghaus Illusion underscores how easily our perception can be tricked, urging us to interrogate what we think we know. It’s a call to think critically, constantly reevaluating our understanding to avoid being misled by appearances.

Share this on...

Comments

Join the Conversation! Currently logged out.

WWB Season 7 — Returning 2026!

I’m taking this time to catch up with the paired videos for recent WWB editions, and to restructure the WWB into seasions of 10 weeks: four 1-Minute Hot Topics. Each week featureing a tidbit in science, philosophy, critical, thinking, and history. Follow the TST YouTube channel to catch all new videos. –Mike

Weekly Wisdom Builder 
December 3, 2025 Edition
February 26, 2025 Edition
Time Left: 

Subscribe!

It’s Free! No ads! No catches! One email each Thursday.

Exactly what the world needs RIGHT NOW!
Wisdom at the crossroads of knowledge.

Wisdom emerges from the consistent exploration of the intersections of philosophy, science, critical thinking, and history.

More 1-Minute Hot Topics...

NEW BOOK! NOW AVAILABLE!!

30 Philosophers: A New Look at Timeless Ideas

by Michael Alan Prestwood
The story of the history of our best ideas!
Scroll to Top