Famous quotes containing the words constructive, set and/or theory:
“If grandparents want to have a meaningful and constructive role, the first lesson they must learn is that becoming a grandparent is not having a second chance at parenthood!”
—Eda Le Shan (20th century)
“It’s the set of the sails and not the gales,
That bids them where to go.”
—Ella Wheeler Wilcox (1850–1919)
“Everything to which we concede existence is a posit from the standpoint of a description of the theory-building process, and simultaneously real from the standpoint of the theory that is being built. Nor let us look down on the standpoint of the theory as make-believe; for we can never do better than occupy the standpoint of some theory or other, the best we can muster at the time.”
—Willard Van Orman Quine (b. 1908)
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