Since Miranda v. Arizona was decided in 1966, much scholarly attention has been devoted to both the theoretical underpinnings and the real world impact of that decision. Little attention, however, has been paid to the substance or content of the warnings. The Supreme Court has often stated that the Miranda warnings requirement is a prophylactic rule that can change and evolve. However, in spite of 40 years of legal developments and practical experience, the content of these famous four warnings has never been modified or even been subjected to systematic scrutiny. This Article proposes that the substance of the Miranda warnings should be reconsidered as the rules of law underlying the warnings substantially evolve, and as we gain ...