A Positive Modal Ontology: A First-Order Formal Alternative to Kantian Limitation

Article Summary The article develops a formal system in First-Order Modal Logic (S4) that articulates a positive monist ontology. Its central claims are: Being is necessary — something exists in every possible world. Non-Being is not an ontological entity, but merely the absence of modal actualization. Potency is distinct from Act — not everything that can happen must happen. Acts are contingent, which blocks modal collapse (unlike S5). No act occurs ex nihilo — every actualization depends on Being. Reality is, in principle, cognizable — there is no ontological “outside” beyond intelligibility. The Kantian noumenal barrier is rejected: there is no unknowable thing-in-itself separate from the modal–rational structure of reality. Result: The article does not prove the truth of the ontology, but it does prove its formal coherence. It shows that a non-skeptical, post-Kantian metaphysics can be logically consistent, non-trivial, and formally defensible, without collapsing into determinism or pre-critical dogmatism.