This project aims to develop and test a new model of psychological processes by which people come to understand information as true or not. This project expects to generate advances in knowledge about how different groups produce opposing understandings of the world ("partisan truth"), despite equally rational and unbiased psychological processes. Expected outcomes include the development of a single framework to explain current piecemeal findings, expanding the analysis to current and socially-urgent partisan debates over truth (e.g., vaccine hesitancy). Significant benefits include advancing knowledge and the development of guidelines to aid policy-makers and educators in the ultimate reduction of social discord caused by partisan truth.