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A video about the Mary the Color Scientist problem. The thought experiment is supposed to make it seem like it's obvious Mary wouldn't be able to anticipate what seeing a color is actually like. I think this thought experiment is bogus, since it's based on the assumption that "complete" knowledge doesn't involve feeling. If we assume she knows everything about color, then she would know what it would feel like to see color, and she would easily be able to identify colors, based on our initial assumptions. In other words, it's a thought experiment that assumes the answer is she wouldn't know what it feels like to see color, even though we've assumed she can based on the parameters of the experiment.
Contributed by Sammo Lea