This document discusses do-not-resuscitate (DNR) orders and the rationales behind them. It identifies three main rationales for issuing a DNR order: 1) no medical benefit (medical futility), 2) poor quality of life after CPR, and 3) poor quality of life before CPR. Each rationale has different implications for patient values, generalization to other treatments, and communication with patients, families, and medical staff. Clear communication of the specific rationale is important to avoid confusion and conflicts.