{"id":"source-change-problem","text":"Beliefs derived from source material that has since changed may no longer be true. Source documents are updated, deprecated, or replaced over time. Without tracking which sources support which beliefs, the belief network silently diverges from reality.","truth_value":"IN","source":"repo:beliefs-pi/CLAUDE.md","source_url":"","source_hash":"","justifications":[],"dependents":["stale-belief-problem"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"source-change-problem","truth_value":"IN","reason":"premise"}]}}