Isaac Newton Quotes on Methodology
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I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypotheses;' for whatever is not deduced from the phenomena is to be called a hypothesis, and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.
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We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
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Hypotheses non fingo.