Christopher Grau's Bad Dreams, Evil Demons, and the Experience Machine: Philosophy and the Matrix

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In “Bad Dreams, Evil Demons, and the Experience Machine: Philosophy and the Matrix”, Christopher Grau explains Rene Descartes argument in Meditation. What one may interpret as reality may not be more than a figment of one’s imagination. One argument that Grau points out in Descartes essay is how one knows that what one think is an everyday experience awake is not all a part of a hallucination. He uses the example of dreams to draw a conclusion about is claim based on experiences one would experience with dreaming. He asserts that there are times when one wake up from a dream that seems to be “vivid and realistic” however soon finds that it was not. The experience of reality in the dream was all a part of the mind. If dreams seem to be reality and one would not have any concept that one is dreaming how does one know that one is not dreaming now? Descartes point is that one cannot justify reality in the sense that one could be dreaming right at this moment and not know therefore one cannot trust the brain as an indicator of what is reality.

The brain perception of reality does not gi...

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