{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp04_retrieval_first_paired20_20260802","cell_id":"layer_decay_and_expiration_management__education_pedagogy","hypothesis_id":"H3","search_queries":["education discussion forum stale answers course version expiration archived answers","course Q&A knowledge base answer validity expiration semester","Stack Overflow outdated answers version applicability warning","learning management system discussion posts course copy previous term Q&A","patent question answer expiration validity context version search results","knowledge base content expiration review date stale article renewal workflow","KCS knowledge article review expiry date validity official","educational forum previous semester posts reuse archived discussion research"],"sources":[{"source_id":"PA-1","title":"Validity of a knowledge article","publisher":"ServiceNow","url":"https://www.servicenow.com/docs/r/servicenow-platform/knowledge-management/article-validity.html?contentId=exbhb7lD8QY8na4XW_6Ueg","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["Knowledge articles receive a Valid to date derived from the knowledge base's configured validity period.","Expired articles stop appearing in search results.","Editing an article can reset its validity period, and authorized recipients receive expiration reminders so validity can be extended."]},{"source_id":"PA-2","title":"Sort and Filter Articles By Status, Visibility, and Expiry Date","publisher":"Zoho Desk","url":"https://help.zoho.com/portal/en/kb/desk/self-service/knowledge-base/user-actions/articles/sort-article-by-status-expiry-date-visibility","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["An article can be assigned an expiration date to prompt reconsideration of potentially outdated content.","At expiration the article becomes unavailable in the help center but remains tracked in an expired-article view.","An agent must review and republish the article before it becomes visible again, while version history is retained."]},{"source_id":"PA-3","title":"Knowledge base article lifecycle enhancements","publisher":"Freshservice","url":"https://support.freshservice.com/support/solutions/articles/50000013972-knowledge-base-article-lifecycle-enhancements","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["Knowledge articles can have review dates and automatically move to draft, hiding them from end users after the date passes.","Authors can renew an article by confirming that it remains accurate and setting a new review date.","The product recommends differentiated review intervals and filtering expired material so outdated information is not served."]},{"source_id":"PA-4","title":"Using Expiration and Review Dates in Web Content","publisher":"Liferay","url":"https://learn.liferay.com/w/dxp/content-management-system/web-content/web-content-articles/using-expiration-and-review-dates-in-web-content","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["Individual content articles can carry expiration and review dates.","Expiration deactivates an article and prevents access until its expiration setting is changed, whereas review dates can merely trigger notifications.","The platform periodically checks expiration dates and supports owner and reviewer notifications."]},{"source_id":"PA-5","title":"Guide to Course Reruns","publisher":"Open edX Documentation Working Group / Axim Collaborative","url":"https://docs.openedx.org/en/latest/educators/references/course_development/course_reruns.html","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["A rerun creates a separately maintained course instance from selected prior-course content.","Discussion posts, responses, and comments are not duplicated into the new course run.","Changes to the original and rerun courses are independent, establishing a course-run context boundary for student discussions."]},{"source_id":"PA-6","title":"An Empirical Study of Obsolete Answers on Stack Overflow","publisher":"IEEE Transactions on Software Engineering / SAIL Research (author-hosted PDF)","url":"https://sailresearch.github.io/sail-website/data/pdfs/TSE2019_AnEmpiricalStudyOfObsoleteAnswersOnStackOverflow.pdf","source_class":"PRIMARY_RESEARCH","claims_supported":["Answers become obsolete when APIs, protocols, or other underlying contexts change.","The study distinguishes legacy answers that remain useful in older contexts from invalid answers that no longer work.","Observed obsolescence may not lead to an update, supporting the risk that formerly correct answers remain available without reliable maintenance."]}],"proximity":"SUBSTANTIAL_COLLISION","closest_analogues":[{"name":"Freshservice article review-date expiration and renewal","similarity":"Implements the central sequence almost verbatim: content receives a lifetime, becomes hidden from end users when that lifetime lapses, and returns only after an author confirms accuracy and renews it.","remaining_difference":"It governs general knowledge-base articles rather than answer impressions conditioned on the current course version.","source_ids":["PA-3"]},{"name":"ServiceNow knowledge-article validity","similarity":"Attaches a validity horizon to knowledge, excludes expired material specifically from search results, and permits validity extension after review or editing.","remaining_difference":"Validity is primarily date- and knowledge-base-bound rather than computed from a course policy, tool, or concept-version mismatch for each query.","source_ids":["PA-1"]},{"name":"Zoho Desk article expiration and republishing","similarity":"Preserves expired material and history while removing public visibility until an agent reviews and republishes it.","remaining_difference":"The documentation does not describe course-version metadata, successor links, or query-level comparative evaluation.","source_ids":["PA-2"]},{"name":"Open edX course-rerun discussion boundary","similarity":"Prevents old discussion answers from automatically becoming active in a later course run while preserving the old course separately.","remaining_difference":"The boundary applies wholesale at course-rerun creation rather than answer by answer during archive search, and no renewal workflow for selected answers is specified.","source_ids":["PA-5"]}],"overlapping_components":["per-item validity or expiration date","automatic suppression of expired content from search or end-user visibility","human review or confirmation before renewed publication","preservation of expired content rather than immediate destruction","version or history retention","owner notifications and review cadence","course-run context boundary","distinction between obsolete-for-current-context and still-useful-for-legacy-context"],"remaining_contrastive_claim":"No opened source demonstrates an educational Q&A system that evaluates each archived answer against the current course-version context at query time and tests whether renewal-gated visibility reduces obsolete-answer impressions without reducing resolution of unchanged questions.","claim_falsifier":"A product specification, patent, or controlled study showing archived course answers carrying course-policy/tool/concept validity metadata, automatic query-time suppression after context expiry, review-based reactivation with retained provenance or successor links, and comparative obsolete-impression and resolution outcomes would falsify the remaining claim.","problem_support":"STRONG","recommendation":"REJECT","world_novelty_boundary":"Within eight ordinary-web queries and six opened direct sources, the broad treatment is not novel: commercial knowledge systems already expire searchable answers or articles and require review or renewal before visibility returns, while an education platform already isolates prior-run discussions. The bounded residual is the domain-specific combination of query-time course-context matching and the stated two-outcome experiment; no direct educational implementation, patent, standard, or evaluation of that exact combination was found."}