Well my hiatus from this blog is over and regular posting will begin again.
This optical illusion was pointed out to me by my 9 year old son. He found it in an I Spy book and noticed and illusionary aspect to it. Here is an image similar to the one he drew to show me. This image is often presented in this view with a comment asking if one piece is missing from this pie/cake/cheese or is an extra piece jutting out from the pie/cake/cheese.
Image borrowed from Planet Perplex
But my son saw more. He took the image and flipped it upside down and he noticed that when viewed this way something seemed different.
What was different was when viewed this way instead of looking like one piece was eaten it appears that only one piece of pie/cake/cheese remains in the dish. This is the first time I have ever heard this take on this illusion and thus named it after my son for his keen observational skill.
It is good to be back again, I hope you all will forgive me the absence.