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Books in the Ontological Arguments category examine a family of a priori arguments that aim to establish the existence of God—or a necessary, maximally great being—through conceptual analysis rather than empirical evidence. This shelf spans classic texts (Anselm’s Proslogion, Descartes, Leibniz), influential critiques (Gaunilo, Hume, Kant’s “existence is not a predicate”), and contemporary reformulations using modal logic and possible-worlds semantics (e.g., Gödel, Plantinga), alongside accessible primers and scholarly surveys. Common themes include perfection and divine attributes, necessity and possibility, the status of existence as a property, and the structure of deductive proof, as well as parodies and objections like the “perfect island.” Bridging philosophy of religion, metaphysics, and logic, these works range from historical and interpretive studies to highly technical analyses, all focused on whether pure reason can demonstrate—or undermine—the existence of a perfect being.

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