I saw it with my own eyes

You generally believe what you see, indeed the expression "I saw it with my own eyes" conveys a sense of truth about a witnessed event. The mindbender below is quite amazing. It was produced by Edward Adelson of the Department of Brain and Cognitive Sciences at the Massachusetts Institute of Technology. Thanks for Pilgrims' fan Adam Hallgarth for suggesting to me that it would make a good Mindbender. When you see the solution, you won't believe it, but it is true. You will certainly think twice about calling out "Did you see that referee?" at the next match!

The puzzle

A very simple question. In the figure below, which square is the darker, A or B?

Adelson Illusion

Click here for the solution.

Back to Boston United Home Page. Back to the Mindbenders