The basic idea seems to be that if the user wants to install random, unaudited software, they can safely do so without worry that the application will steal their contacts, record their voice, or otherwise engage in bad behaviour. What keeps the user safe is the ability to allow or deny an app access to these various …

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The knowledge argument wants to show us that the world contains more than physical facts. Mary is a colour scientist, and has studied every possible fact about colour, from how light-waves work, to how it's processed on the human brain. However, Mary has been raised in a black and white room, and has never seen colour. …

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