PSR meaning in Community ?

Answer: What is Principle of Sufficient Reason mean?

The principle of sufficient reason states that everything must have a reason or a cause. The modern formulation of the principle is usually attributed to early Enlightenment philosopher Gottfried Leibniz, although the idea was conceived of and utilized by various philosophers who preceded him, including Anaximander, Parmenides, Archimedes, Plato and Aristotle, Cicero, Avicenna, Thomas Aquinas, and Spinoza. Notably, the post-Kantian philosopher Arthur Schopenhauer elaborated the principle, and used it as the foundation of his system. Some philosophers have associated the principle of sufficient reason with "ex nihilo nihil fit". William Hamilton identified the laws of inference modus ponens with the "law of Sufficient Reason, or of Reason and Consequent" and modus tollens with its contrapositive expression.

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