Modernism Is So Old-Fashioned!

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Per Kenneth Arrow: "I am old-fashioned enough to retain David Hume's view that one can never derive 'ought' propositions from 'is' propositions."

What a weird thing to say! Hume's disjunction would have been considered nutty by most of the people living in most times and places before Hume. It is quite a bit more "old-fashioned" to recognize that one can derive oughts from ises than it is to believe the opposite.

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