It's entirely a possibility, and with the growing research in the field of mental studies, there is more and more evidence that it could be entirely possible . For the following scenario, imagine that a person associates blue with the sky and gray with clouds. This person wakes up and goes out to get their morning paper, looks up and thinks a storm is coming, because they have just associated the blue sky with their knowledge that clouds are gray and that gray clouds bring probably rain, or vice versa, the A person sees a gray sky and thinks it will be a beautiful sunny day, but it starts raining a few minutes later. A few minutes later, the significant other calls them and asks them about the weather, and the person says something like, "It's a beautiful, blue, sunny day", at which point the person is confused because she had associated blue. sky with rain, but it usually doesn't rain when there is a blue sky. Is it possible that instantly this man's color perception changed, well, according to the inverted spectrum theory; Yes. So if this is possible, will the theory challenge the idea of ​​functionalism? functionalism is the idea that mental states are defined by what they do, not by their physical properties. Spectrum inversion