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For centuries, observers have noted the many obstacles to intellectual change in science. In a much-discussed paper published in Scientific American in 1972, molecular biologist Gunther Stent proposed an explicit criterion for one kind of obstacle to scientific discovery. He denoted a claim or hypothesis as "premature" if its implications cannot be connected to canonical knowledge by a simple series of logical steps. Further, Stent suggested that it was appropriate for the scientific community to ignore such hypotheses so that it would not be overwhelmed by vast numbers of false leads....

The Disputed Legacy of Sidney Hook examines the sixty-year career of one of the foremost public intellectuals in the United States. Sidney Hook's convictions were widely disseminated through books, academic journals, newspapers articles, lectures, and several organizations that he founded. Hook's legacies include being a leading Marxist-Leninist scholar, his long-standing commitment to secular humanism, his legacy as a legendary polemicist, his cultural conservatism if not neoconservatism, and his defense of democracy and John Dewey's pragmatic and Cold War liberalism. Bullert concludes that...