Theory and Algorithms for Learning with Multi-Class Abstention and Multi-Expert Deferral
Anqi Mao
Why it matters: This work provides the theoretical foundation and practical algorithms for AI systems to safely 'know what they don't know' by rigorously deferring difficult tasks to experts or abstaining from high-risk predictions.
Establishes $H$-consistent surrogate losses for multi-class abstention and multi-expert deferral. These formal guarantees enable reliable routing of uncertain inputs to specialized experts, mitigating hallucinations and ensuring robust performance