What Mary Didn T Know Summary

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Frank Jackson, a philosophy professor at the Australian National University, contends against physicalism in his article "What Mary Didn't Know" (1986). He intended to disprove physicalism, the view that all knowledge is physical by proving that some knowledge is only obtainable through conscious experience.
Jackson proposes an experiment where a scientist, Mary, is an expert in the science of color but has been raised in an entirely black and white world. When Mary has learned all that there is to know about color, she is released into the world where she will finally experience various colors for the first time. The question at hand is whether or not Mary learns anything new when she is let out into the real world to experience color. Jackson argues that Mary, by experiencing color, indeed learns something new because color cam be classified as qualia, or properties of a sense perception that cannot be described in words alone; rather, it needs to be experienced to be fully …show more content…

Therefore, by Leibniz’s Law, sensations and their properties ≠ brain states and their properties.”
Whereas, Jackson summarizes it as:
1. “Mary (before her release) knows everything physical there is to know about other people.
2. Mary (before her release) does not know everything there is to know about other people (because she learns something about them on her release).
3. Therefore, there are truths about other people (and herself) which escape the physicalist story.”
How do you begin to describe the color green to someone who is colorblind? Perhaps, you could explain that green is produced by mixing blue and yellow together, or, perchance, you elucidate color perspective and the sentiments behind the color. Scientifically, you could explain that the wavelength for green is around 495 to 570 nm and the frequency is 526 to 606 THz; however, despite all of this, the colorblind person will never be able to visualize the color green in their head. This alone proves the existence of

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