What is emotional tolerance change?

Emotional tolerance change is a concept in personal epistemology: Changing a deeply held mental model is uncomfortable — expect and accept this.

Example: You've built your career on the belief that working harder produces better results. Then evidence accumulates — burnout, diminishing returns, a colleague who works fewer hours but ships better outcomes. Your chest tightens. You feel irritated at the evidence. That physical resistance is not a sign you're wrong to reconsider. It's a sign the schema matters to you. The discomfort is the cost of admission for growth.

This concept is part of Phase 16 (Schema Evolution) in the How to Think curriculum, which builds the epistemic infrastructure for schema evolution.