The principle of sufficient reason states that nothing is without a ground or reason why it is. The principle is usually attributed to Leibniz, although the first person to use it was Anaximander of Miletus. Also Alexander R. Pruss argued the principle of sufficient reason relating with "ex nihilo nihil fit".
Read more about Principle Of Sufficient Reason: Formulation, Leibniz's View, As A Law of Thought, Schopenhauer's Four Forms
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