... conclusion "Carlo is an animal." The conclusion is correct because we have reasoned in accordance with the laws of logic, with the laws of valid thought. All logical reasoning is, of course, not so simple as the example given, but it may be stated generally that when there is no logical fallacy, a correct conclusion may be arrived at, provided, too—and herein lies the difficulty—provided that the premises are also true. These premises may be in themselves general statements—how is their truth established? They may be, and often are, the generalisations ... — Rudolph Eucken • Abel J. Jones
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