{"id":"visitor-heterogeneous-traversal-generalizes-iterator-abstraction","text":"Visitor's capacity to operate on objects without a common parent class structurally generalizes Iterator's traversal abstraction: while Iterator separates traversal from aggregate (requiring a uniform collection interface), Visitor separates operations from heterogeneous element structures (requiring no shared element type) — Visitor provides broader extensibility but demands more from element classes, trading the aggregate interface requirement for the Accept protocol.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["gof-visitor-no-common-parent-required","iterator-separates-traversal-from-aggregate"],"outlist":[],"label":"Visitor extends Iterator's traversal-action separation to heterogeneous type collections"}],"dependents":[],"metadata":{"source_type":"derived","review_result":"invalid"},"created_at":"2026-06-18T04:45:05+00:00","updated_at":"2026-06-18T06:15:08+00:00","reviewed_at":"2026-06-18T06:15:08+00:00","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"visitor-heterogeneous-traversal-generalizes-iterator-abstraction","truth_value":"IN","reason":"SL justification valid","antecedents":["gof-visitor-no-common-parent-required","iterator-separates-traversal-from-aggregate"],"label":"Visitor extends Iterator's traversal-action separation to heterogeneous type collections"},{"node":"gof-visitor-no-common-parent-required","truth_value":"IN","reason":"premise"},{"node":"iterator-separates-traversal-from-aggregate","truth_value":"IN","reason":"premise"}]}}