Web the thing about science fiction and thought experiments, chalmers told me when we spoke in late 2021, is that they don't just illustrate a philosophical problem:. Web visual illusions are defined by the dissociation between the physical reality and the subjective perception of an object or event. The colorful tricks eyes play: Web the theory of spatial illusions outlined here distinguishes between classes of illusory effect and, in linking each to its particular class of spatial constancy, offers a general and. Web quick optical illusion science activities for all ages afterimages: