LEGAL PRINCIPLE: CIVIL PROCEDURE – Res Judicata – Issue Estoppel – Applicability to Mixed Questions of Fact and Law

Issue estoppel’s scope is comprehensive—applies to all types of issues regardless of categorization. Categories covered: (1) Pure fact issues: Factual determinations in prior case; (2) Pure law issues: Legal principles/rules decided; (3) Mixed fact and law: Issues combining factual findings with legal application. All are subject to issue estoppel—no exemption for any category. This serves: comprehensive finality, preventing re-litigation regardless of issue type, and avoiding artificial distinctions. “Whether…fact or law or…mixed” means: issue estoppel doesn’t discriminate by issue type, applies universally to decided issues, and prevents re-opening any previously determined point. This prevents parties from: arguing factual issues were “really” legal (or vice versa) to avoid estoppel, claiming mixed issues aren’t estopped, or exploiting categorization ambiguities. Why comprehensive: Final decisions bind on all issues decided—whether fact, law, or mixed—otherwise parties could endlessly re-litigate by recategorizing issues. This ensures: true finality, comprehensive estoppel coverage, and preventing evasion through classification arguments. Courts need not: categorize issues as fact/law/mixed, determine predominant character, or limit estoppel based on issue type. If issue was decided: estoppel applies regardless of categorization. This broad scope ensures issue estoppel serves its purpose—preventing re-litigation of decided issues.