Descartes realized that when he is in the state of having a Dream, he has a perception, at that moment he all of his senses are being deceived as everything in that world of dreams are indistinguishable to the world of reality.
Premise 1: We can't always tell when we are dreaming.
Premise 2: if we can't tell that we are dreaming, we can't be certain that we are dreaming right now.
Premise 3: If we cannot be certain that we are not dreaming right now, then we cannot know anything about the world of reality.
Conclusion: We can't know anything about the world of reality.
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Summary of Meditation I. Of the things which may be brought within the sphere of the doubtful.
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Similar ideas to The Dreaming Hypothesis
The 17th century Frenchman René Descartes had observed how easily our senses are fooled and noted the difficulty of being certain about any human experience, which he claimed can be faked.
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