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The “Ontological Argument” category gathers books that examine the family of a priori arguments claiming to demonstrate God’s existence from the very concept of a maximally great or necessarily existent being. It spans classic sources (e.g., Anselm’s Proslogion, Descartes, Leibniz, Spinoza), modern reformulations (Plantinga’s modal version, Gödel’s formal proof), and major critiques (Gaunilo’s parody, Aquinas’s objections, Hume’s skepticism, Kant’s denial that existence is a predicate). Works in this genre probe necessity and possibility, essence and existence, possible-world semantics, and the interface of logic, language, and theology, ranging from accessible introductions to technical monographs and anthologies. It appeals to readers in philosophy of religion, analytic metaphysics, theology, and formal logic.

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