"Any useful logic must concern itself with Ideas with a fringe of vagueness and a Truth that is a matter of degree."

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An idea is like a play. It needs a good producer and a good promoter even if it is a masterpiece. Otherwise the play may never open; or it may open but, for a lack of an audience, close after a week. Similarly, an idea will not move from the fringes to the mainstream simply because it is good; it must be skillfully marketed before it will actually shift people's perceptions and behavior.

— David Bornstein