Definition
Precedent logic (or reasoning by precedent) is a form of inductive and analogical reasoning primarily used in common law systems, where past decisions (precedents) are used as the basis for resolving current cases with similar facts.
Why It Matters
Precedent logic is the “Cache” of civilization. By standing by past decisions, we minimize the “Cognitive Load” of the legal system and ensure fairness (treating similar cases similarly). If we ignore precedent, the “rules of the game” change every day, making long-term investment and social trust impossible.
Core Concepts
- Stare Decisis: The legal principle of determining points in litigation according to precedent (“to stand by things decided”).
- Ratio Decidendi: The point in a case that determines the judgment; the core rationale that establishes the precedent.
- Distinguishing: Arguing that the facts of a current case are materially different from the precedent, thus the precedent should not apply.