New Formal Framework Proposed for How Minds Infer Others' Beliefs
Researchers have published a theoretical framework called Theory of Mind Utility (ToM-U) that formalizes how cognitive systems infer what others believe by tracking information sources and credibility. The framework uses directed graphs called Local Epistemic World Models to represent agents and their knowledge relationships, differing from existing Bayesian and simulation-based approaches. This work could help explain the computational basis of social reasoning and generate testable predictions about when mentalizing fails.
A new preprint on arXiv proposes Theory of Mind Utility (ToM-U), a formal computational model for how minds infer others' beliefs and knowledge states. Rather than assuming beliefs exist, ToM-U derives them by constructing Local Epistemic World Models—directed graphs representing agents, information states, and epistemic relationships—and evaluating candidate models against observed behavior. The framework includes five formal definitions specifying model structure, agent properties including ordered information access history, mechanisms for recursive mentalizing, three inference procedures, and a residue function capturing traces of failed mentalizing attempts. The authors argue ToM-U differs fundamentally from existing approaches: Bayesian Theory of Mind presupposes rather than derives belief states, while simulation theory and theory-theory lack formal apparatus for epistemic inference. The model generates directional, falsifiable predictions about mentalizing failures based on structural properties rather than auxiliary assumptions, and positions itself as upstream of goal inference and other social cognitive processes.
What's missing
The paper does not appear to include empirical validation or experimental testing of the ToM-U framework against human behavioral data, though it claims to generate falsifiable predictions. Additionally, the specific computational complexity and scalability of the model for realistic social scenarios remain unspecified in the abstract.
What different sources said
- arXiv cs.AICenter
The Theory of Mind Utility: Formal Specification of a Mentalizing Mechanism
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