 Inverted Earth. Block (1990) appeals to an “Inverted Earth,” a planet exactly like Earth except that its real physical colors are (somehow) inverted with respect to ours. The Inverted Earthlings’ speech sounds just like English, but their intentional contents in regard to color are inverted relative to ours: When they say “red,” they mean green (if it is green Inverted objects that correspond to red Earthly objects under the inversion in question), and green things look green to them even though they call those things “red.” Now, an Earthling victim is chosen by the customary mad scientists, knocked out, fitted with color inverting lenses, transported to Inverted Earth, and repainted to match that planet’s human skin and hair coloring. Block contends that after some length of time—a few days or a few millennia—the victim’s word meanings and propositional-attitude contents and all other intentional contents will shift to match the Inverted Earthlings’ contents, but, intuitively, the victim’s color qualities will remain the same. Thus, sensory qualities are not intentional contents.