The outside world is mediated through our sense organs, so what we perceive and feel are just representations of reality. The only things we cannot doubt are our inner emotions: we cannot doubt that we are happy, sad, in love, or in grief, when such states apply. The only other thing we cannot doubt is… to doubt!
Super Optical Illusions (aka Xtreme Illusions 2) is a children book project I enjoyed to make three years ago for the publishers “Carlton Books” [amazon.co.uk], “National Geographic Kids” [amazon.com] and “Ça m’intéresse” [amazon.fr]. It looks really fantastic and my pictures are large to enjoy the details! It is a family book that will encourage the young reader to explore the mysteries that lie right inside our own minds (including the key scientific concepts of perspective and perception).