Formal Models of Belief Change

Formal models of belief change are structured ways to understand how people modify their beliefs when presented with new information or experiences. These models describe processes like belief revision (updating beliefs), belief contraction (removing beliefs), and belief expansion (adding new beliefs). They help us analyze how individuals and groups adjust their understanding of the world, especially when faced with conflicting evidence. By using formal logic, these models provide a rigorous framework for exploring how knowledge evolves, ensuring consistency, and accommodating new insights in a coherent manner.