BUILD 050-B — Environment Assumption & Tradeoff Explorer 1. A ROOM MODEL IS NOT EVIDENCE. A fictional room can expose assumptions without claiming how a real person will respond. 2. DECLARE THE VARIABLES. Light, sound, layout and nature are model inputs—not measured causes or effects. 3. CHANGE THE FICTIONAL CONTEXT. When room or goal changes, recompute only the declared tradeoff model. 4. SHOW WHAT IS UNKNOWN. Real exposure, people, responses, accessibility and competing needs remain unmeasured. 5. MODEL ≠ MEASUREMENT ≠ PRESCRIPTION. An illustrative score cannot become a health, performance or design conclusion. 6. MAKE THE ASSUMPTIONS VISIBLE. Use the model to form questions for real evidence and affected people. LIMITATION Synthetic demonstration only. No evidence-strength, causal, universal, accessibility, health or design-prescription claim is produced.