“Maintain a constant watch at all times against a dogmatical spirit: fix not your assent to any proposition in a firm and unalterable manner, till you have some firm and unalterable ground for it, and till you have arrived at some clear and sure evidence.”

—  Isaac Watts

(1741), Ch. I, General Rules for the Improvement of Knowlege, Rule X "Avoid a dogmatical spirit".
1720s, The Improvement of the Mind (1727)

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Isaac Watts 47
English hymnwriter, theologian and logician 1674–1748

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