Principle of Ultimate Explanatory Simplicity (PUES)

This paper introduces the Principle of Ultimate Explanatory Simplicity (PUES), a proposed epistemic ground axiom meant to terminate infinite regress in "whatness" and "whyness" inquiries. While the title "Explanatory Simplicity Theism" (EST) may suggest theological innovation, this work is not a metaphysical argument for a personal or classical God. Instead, it explores the necessity of a logically minimal explanatory terminus—one that functions like an axiom in logic or mathematics. The result is a framework grounded in parsimony and epistemic necessity, offering a non-relational, non-causal grounding principle that sustains explanatory coherence. This is a paper about axioms, not altars.