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“...but in the case of contingent truths, that is, when something can exist in different ways, and none of its determinations are more necessary than others, the need for another principle arises, since that of contradiction vanishes... this principle, on which all contingent truths depend, and which is no less primitive or universal than that of contradiction, is the principle of sufficient reason.” — Gabrielle-Émilie Le Tonnelier de Breteuil du Châtelet
...but in the case of contingent truths, that is, when something can exist in different ways, and none of its determinations are more necessary than others, the need for another principle arises, since that of contradiction vanishes... this principle, on which all contingent truths depend, and which is no less primitive or universal than that of contradiction, is the principle of sufficient reason.