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The emergency department (ED) is a high-risk environment where diagnostic error is not uncommon. Most errors (70%) are due to faulty reasoning. 1 Decision making occurs through two primary pathways: 1) Pattern recognition is fast, intuitive, and heuristically driven and occurs largely unconsciously; 2) analytic thinking is slow and deliberate and takes place under conscious control. When functioning optimally, expert clinicians toggle back and forth between these two systems depending on the complexity of the case and the demands of the environment. Systematic errors (known as biases) can interfere with reasoning via either pathway, but predominately affect the abbreviated decision making associated with pattern recognition. Thus, a critical feature of cognitive bias mitigation involves deliberate “switching” from intuitive to analytical processing and the deliberate use of debiasing strategies. 2, 3