a. (UN-1 7 b.)

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1627.  Jackson, Creed, VI. x. § 1. That God … did set the course of nature a-going with an irresistible and unretractable swinge.

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1900.  Omond, Romantic Triumph, iv. 276. The lucidus ordo of his [Comte’s] central conception is a possession for ever, an unretractable gift to France and to the world.

3