{"id":"gof-23-design-patterns","text":"The Gang of Four catalog defines 23 design patterns organized into three categories: 5 Creational (Abstract Factory, Builder, Factory Method, Prototype, Singleton), 7 Structural (Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy), and 11 Behavioral (Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor).","truth_value":"OUT","source":"entries/2026/06/17/gof-oo-chunk-1.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{"last_premise_reviewed":"2026-06-17T13:16:24","premise_review_result":"pass","_retracted":true},"created_at":"2026-06-17T17:04:08+00:00","updated_at":"2026-06-17T18:33:58+00:00","reviewed_at":"","verified_at":"","retracted_at":"2026-06-17T18:33:58+00:00","explanation":{"steps":[{"node":"gof-23-design-patterns","truth_value":"OUT","reason":"retracted premise"}]}}