Ancient and medieval authors knew all about unicorns and salamanders; not one of them thought it necessary to avoid dogmatic statements about them because he had never seen one of them.

古代和中世纪的作家谈起独角兽和火蛇来如数家珍，但他们中没有一个人认为，因为自身从未见过这些东西的任一种而有必要避免对它们作武断的阐述。

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Religious faith was not rationally defensible, but he thought that some dogmatic beliefs (preferably Roman Catholic) were necessary for social cohesion.

ECONOMIST: Liberty and democracy