# 🧠 Proof of Extended Modal Realism --- ## **Definitions** ### **Brutalism** Brutalism is the metaphysical view that **some facts obtain without any explanation, cause, or sufficient reason**. These are called **brute facts** β€” they are simply true, without any further grounding or intelligibility. Brutalism explicitly denies the Principle of Sufficient Reason. ### **Principle of Sufficient Reason (PSR)** The PSR is the principle that: > *For every fact that obtains, there is a sufficient reason why it is so and not otherwise.* It applies not only to empirical events but to metaphysical facts, modal realities, and the existence of the universe itself. ### **Extended Modal Realism (EMR)** Extended Modal Realism is the view that: > *All worlds β€” possible, impossible, and incoherent β€” exist.* This includes: - Logically consistent worlds (standard modal realism), - Metaphysically or nomologically impossible worlds (violating identity or physical law), - Logically incoherent worlds (e.g., containing contradictions or undefined objects). EMR rejects all arbitrary limits on what counts as a β€œworld,” allowing every definable or conceivable structure to have being in some modal domain. --- ## **Argument** ### **Premise 1:** **Brutalism** denies the PSR and allows for brute facts β€” facts without explanation or intelligibility. ### **Premise 2:** **Brutalism is incoherent** because: - It undermines the very possibility of reasoning, inference, and justification. - Any assertion (including brutalism itself) presupposes the availability of sufficient reason. - Therefore, brutalism is self-defeating and cannot possibly be correct. ### **Premise 3:** If brutalism is false, then the **Principle of Sufficient Reason must be accepted universally** β€” no fact may be admitted without a sufficient reason. ### **Premise 4:** Any metaphysical system that includes only **some** worlds (e.g., only possible or only coherent ones) must provide a **sufficient reason** for excluding others. ### **Premise 5:** No non-arbitrary, sufficient reason can be given for excluding impossible or incoherent worlds without appealing to brute constraint β€” which reintroduces brutalism and violates the PSR. ### **Premise 6:** **Extended Modal Realism** is the only metaphysical system that **includes all worlds** β€” possible, impossible, and incoherent β€” and thus **requires no arbitrary exclusions**. --- ## **Conclusion** > **Extended Modal Realism must be correct, by necessity.** This follows because it is the only metaphysical system that fully satisfies the Principle of Sufficient Reason while avoiding the incoherence of brutalism.