1690, John Locke, An Essay Concerning Human Understanding, London: Thomas Basset, Book 2, Chapter 28 “Of Clear and Obscure, Distinct and Confused Ideas,” p. 168, […] we have no more a clear Idea of infinite Parts in Matter, then we have a clear Idea of an infinite Number, by being able still to add new Numbers to any assigned Number we have: endless Divisibility giving us no more a clear and distinct Idea of actually infinite Parts, than endless Addibility (if I may so speak) gives us a clear and distinct Idea of an actually infinite Number:
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