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4.1.1 Epistemology
Quick questions on Perception and the external world: realism and idealism - AQA A-Level Philosophy
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how do we know any external world causes them, or what it is like?Show answer
Two sceptical consequences follow. First, we cannot be certain the external world exists at all, since the sense-data would be just the same if there were no objects (this is the door through which scepticism and Berkeley's idealism enter). Second, even if it exists we cannot know its nature, because we only ever compare sense-data with other sense-data, never with the object itself.
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