Modern metaverse platforms, populated by heterogeneous multi-agent systems (MAS), generate vast streams of experiential data whose epistemic value remains largely untapped. This paper introduces the Enigma framework — a formal theory of collective intelligence emergence in metaverse ecosystems, grounded in a novel logical-probabilistic learning theory that extends classical first-order logic with probabilistic confidence annotations and distributed knowledge semantics. We define a Distributed Knowledge Lattice (DKL) over multi-agent interactions and prove that, under precisely stated monotonicity and convergence conditions, the collective knowledge of an agent population forms a complete lattice whose least upper bound represents an emergent cognitive state unreachable by any individual agent. We formalize the dynamics of knowledge creation, verification, and propagation through a system of Logical-Probabilistic Agents (LP-agents) that interact with LLM-driven entities, providing trustworthy and explainable reasoning via symbolic proof chains stored on a multi-blockchain ledger. Central results include: (i) a Collective Intelligence Convergence Theorem establishing conditions under which the system's aggregate knowledge monotonically approaches a fixed point; (ii) a Probabilistic Inference Soundness Theorem guaranteeing that confidence propagation through distributed reasoning chains preserves logical consistency; and (iii) a polynomial-time algorithm for optimal knowledge retrieval from the distributed lattice. The framework is instantiated within the Enigma Metaverse architecture, where smart contracts govern knowledge tokenization, cross-chain knowledge interoperability protocols enable seamless sharing, and decentralized governance mechanisms ensure epistemic accountability. We demonstrate that this synthesis of mathematical logic, probability theory, LLM-based hypothesis generation, and blockchain-secured knowledge persistence provides a rigorous foundation for building self-optimizing, trustworthy, and explainable collective intelligence (CI) in virtual worlds.