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|Sufficient||Holz I 66
Sentence of the sufficient reason/principle/Leibniz: "nothing is done without sufficient reason, without which it is possible for the person who is sufficiently acquainted with things to state a reason why it is so and not otherwise."
This is a derivative of the identity principle. Its validity is logically necessary.
G. W. Leibniz
Philosophical Texts (Oxford Philosophical Texts) Oxford 1998
H. H. Holz
Leibniz Frankfurt 1992