#The Problems of Philosophy

Contemplation not only enlarges the objects of our thoughts, but also the objects of our actions and our affections: it makes

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Is there any knowledge in the world which is so certain that no reasonable man could doubt it?

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As soon as definite knowledge concerning any subject becomes possible, this subject ceases to be called philosophy, and

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There are beliefs — such, for example, as the belief that physical objects exactly resemble our sense-data — which

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