Welcome to Nunn on Evidence

Welcome to Nunn on Evidence, a comprehensive, open-source treatise on U.S. evidence law. The culmination of years of research and writing by Prof. G. Alexander Nunn, Nunn on Evidence is designed for law students, practicing attorneys, judges, and academics alike. It is a living resource dedicated to making in-depth legal knowledge accessible to all, as the treatise is continuously updated, thoroughly verified, and freely available.

A New Model for Legal Treatises

Traditional legal treatises, while foundational, often face many challenges. Their updates are typically infrequent, access can be costly, and the breadth of perspectives may be limited. Nunn on Evidence offers an innovative alternative:

• Always Current: As a "Perpetual Edition," this treatise is designed for rapid updates. New developments in case law and scholarship can be integrated in days, not months or years, ensuring you always have the most current information.
• Unrestricted Access: Our commitment is to democratize legal knowledge. This treatise is freely available online, removing financial barriers and ensuring wide accessibility.
• Comprehensive and In-Depth: Spanning 20 (and counting!) meticulously structured chapters, the treatise covers the full spectrum of evidence law, from core principles like relevance and hearsay to contemporary issues in digital and scientific evidence. It combines foundational principles with practical applications, citing relevant case law and providing explanations that clarify the nuances of evidence rules.
• Diverse Perspectives: We strive to present a nuanced understanding of evidence law by synthesizing a wide range of viewpoints from leading scholars and practitioners.

Our Substantive Approach

We believe that understanding evidence law requires more than rote memorization. Our approach emphasizes:

• Clarity: Breaking down complex concepts into understandable components.
• Context: Explaining the historical and practical importance of each rule.
• Application: Demonstrating how rules and principles function in real-world litigation.
• Analysis: Examining the reasoning behind court decisions and rule interpretations.

How This Treatise is Made

Nunn on Evidence employs a unique, transparent production process to ensure accuracy, timeliness, and quality:

• Expert Drafting: All content is initially drafted by legal experts and scholars with deep knowledge in specific areas of evidence law.
• AI-Assisted Editing: Advanced AI tools assist in refining the language, ensuring clarity, consistency, and comprehensive coverage of legal doctrines. This allows our human editors to focus on substantive accuracy and nuanced legal analysis.
• Human Verification & Cite-Checking: A dedicated team of human cite-checkers meticulously verifies every citation and legal assertion.
• Transparent Audit Log: Each section of the treatise features a transparent audit log, allowing readers to see the history of updates and the date of the last cite-check, providing confidence in the material's currency and accuracy.

Navigating the Treatise

This treatise is organized into Articles, Chapters, and Sections, covering specific topics, rules, or concepts in evidence law. You can navigate using the table of contents in the sidebar. Our structure integrates doctrine, codes, caselaw, and scholarship, allowing readers to seamlessly move between theoretical frameworks and practical applications. The treatise's organization—from core principles to specialized contexts and emerging issues—is designed to be accessible for newcomers while providing the sophisticated analysis experts demand.

How to Cite

G. Alexander Nunn, Nunn on Evidence (2025).

---

Nunn on Evidence is more than just an evidence treatise—it's a commitment to the future of legal scholarship: open, current, meticulously verified, and accessible to all. We believe that by harnessing innovative methods and prioritizing open access, we can provide an invaluable resource for understanding and navigating the complexities of evidence law. We hope this resource enhances your understanding and application of evidence law.

For questions, suggestions, or feedback, please contact alex@nunn.ai.