For though a Child quickly aſſent to this Propoſition, That an Apple is not Fire; when, by familiar Acquaintance, he has got the Idea's of thoſe two different things diſtinctly imprinted on his Mind, and has learnt that the names Apple and Fire ſtand for them; yet it will be ſome years after, perhaps, before the ſame Child will aſſent to this Propoſition, That it is impoſſible for the ſame thing to be, and not to be.
1689 (indicated as 1690), [John Locke], “No Innate Principles in the Mind”, in An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […], book I, § 23, page 12