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101 " Thus ‘how do we know…?’ is transformed into ‘by what authority do we claim…?’ The latter question is a chimera that may well have wasted more philosophers’ time and effort than any other idea. It converts the quest for truth into a quest for certainty (a feeling) or for endorsement (a social status). This misconception is called justificationism. "
― David Deutsch , The Beginning of Infinity: Explanations That Transform the World
102 " I think that there is only one way to science – or to philosophy, for that matter: to meet a problem, to see its beauty and fall in love with it; to get married to it and to live with it happily, till death do ye part – unless you should meet another and even more fascinating problem or unless, indeed, you should obtain a solution. But even if you do obtain a solution, you may then discover, to your delight, the existence of a whole family of enchanting, though perhaps difficult, problem children… "
103 " There is an explanatory link between ought and is, and this provides one of the ways in which reason can indeed address moral issues. "
― David Deutsch