"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"Science, in its ultimate ideal, consists of a set of propositions arranged in a hierarchy, the lowest level of the hierarchy being concerned with particular facts, and the highest with some general law, governing everything in the universe. The various levels in the hierarchy have a two-fold logical connection, travelling one up, one down; the upward connection proceeds by induction, the downward by deduction."
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Source: Bertrand Russell (2009). “The Scientific Outlook”, p.38, Routledge
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