What is this?
a) a mexican wearing a large sombrero
b) a doughnut
c) a millstone
d) a wheel
Yup. Vision lies…
«It is surely the simplest possible representation of a Mexican wearing a large sombrero. Yet such view will be used only as a joke, which results precisely from the contradiction between the correctness and the inadequacy of the representation. The picture is certainly faithful – it can be obtained photographically from a third-floor hotel window – but it is inadequate for most purposes because it does not distinguish a Mexican from a millstone or a doughnut.»
#Rudolph Arnheim, Art and Visual Perception, 1954