Reminder that we are only human

I never really believed everything I heard. From now on, I will no longer believe everything I see. This image has been bothering me for two days!

I used the eyedrop tool to select the color near "A" and dump a square across the "B" box and it's adjacent box. Neat trick!

Yeah, I've seen that one before. Edward H. Adelson is a Professor of Vision Science at MIT. Here's the page:

http://www-bcs.mit.edu/people/adelson/chec...w_illusion.html with the illusion. He also has an explanation.