> ## Documentation Index > Fetch the complete documentation index at: https://docs.fuseai.com/llms.txt > Use this file to discover all available pages before exploring further. # Correct a learned fact > Corrects a learned fact's claim text and/or category. Any member of the owning teammate's team may edit. A new claim must stay anonymized — no person or customer names, no contract-level details — or the call answers 422 `LEARNED_FACT_NOT_ANONYMIZED`. The correction reaches the hubs' pages on the next daily learning run. The response carries only the fields this call changes; read the fact back from `GET /business/knowledge-hubs/learned-facts` for its confidence, channels and dates. Retired facts cannot be edited (404). Errors: - `404` `LEARNED_FACT_NOT_FOUND` — No active fact with that id, it was already retired, or it belongs to another team (existence is never confirmed). - `422` `LEARNED_FACT_NOT_ANONYMIZED` — The new claim names a person or customer, or carries a contract-level detail. - `422` `VALIDATION_FAILED` — Neither claim nor category given, or a value outside its limits or enum. - `429` `RATE_LIMITED` — More than 30 knowledge-hub/campaign requests in a minute (or 1000 in a day). Knowledge hubs share the campaigns bucket. Requires one of the following token scopes: campaigns. ## OpenAPI ````yaml /openapi.json patch /business/knowledge-hubs/learned-facts/{factId} openapi: 3.1.0 info: title: Fuse Business API version: 1.0.0 description: >- External API for lists, campaigns, prospect search and contacts. Authenticate with your API token as HTTP Basic. All paths are under /api/v1. servers: - url: https://api.tryfuse.ai/api/v1 description: Production security: - basicAuth: [] tags: - name: Lists - name: Custom columns - name: Smart columns - name: Exports - name: Campaigns - name: Knowledge hubs - name: Analytics - name: Website intent - name: Account - name: Prospect search - name: Campaign steps - name: Scheduled sends - name: Campaign templates - name: Agents - name: Research - name: Company search - name: Saved searches - name: Folders - name: Contacts paths: /business/knowledge-hubs/learned-facts/{factId}: patch: tags: - Knowledge hubs summary: Correct a learned fact description: >- Corrects a learned fact's claim text and/or category. Any member of the owning teammate's team may edit. A new claim must stay anonymized — no person or customer names, no contract-level details — or the call answers 422 `LEARNED_FACT_NOT_ANONYMIZED`. The correction reaches the hubs' pages on the next daily learning run. The response carries only the fields this call changes; read the fact back from `GET /business/knowledge-hubs/learned-facts` for its confidence, channels and dates. Retired facts cannot be edited (404). Errors: - `404` `LEARNED_FACT_NOT_FOUND` — No active fact with that id, it was already retired, or it belongs to another team (existence is never confirmed). - `422` `LEARNED_FACT_NOT_ANONYMIZED` — The new claim names a person or customer, or carries a contract-level detail. - `422` `VALIDATION_FAILED` — Neither claim nor category given, or a value outside its limits or enum. - `429` `RATE_LIMITED` — More than 30 knowledge-hub/campaign requests in a minute (or 1000 in a day). Knowledge hubs share the campaigns bucket. Requires one of the following token scopes: campaigns. operationId: updateLearnedFact parameters: - name: factId in: path required: true description: >- 24-character hex id of the learned fact (from GET /business/knowledge-hubs/learned-facts). schema: type: string description: >- 24-character hex id of the learned fact (from GET /business/knowledge-hubs/learned-facts). requestBody: required: true content: application/json: schema: type: object properties: claim: type: string minLength: 1 maxLength: 1000 description: >- Corrected claim text (1-1000 characters). Free text — there is no vocabulary — but it must stay anonymized: a deterministic gate answers 422 LEARNED_FACT_NOT_ANONYMIZED when the claim contains an email address, a run of 9 or more phone-like digits, a currency amount in the same claim as deal language (discount, quote, contract, renewal, proposal, negotiated, agreed), or contract vocabulary (renewal date, contract term, termination clause, auto-renew, payment terms, net 30/60/90, master service agreement, MSA, SOW, non-disclosure, NDA). Person and customer names are NOT checked, so keep them out yourself. The edit reaches the hub's pages on the next daily learning run, not immediately. category: type: string enum: - overview - products - pricing - icp-use-cases - differentiators - competitors - faq - source-digest - custom - objection - faq-insight description: >- Fact category, one of overview (company summary), products, pricing, icp-use-cases (ideal customers and use cases), differentiators, competitors, faq, source-digest (digest of one source), custom (user-authored), objection (a buyer objection) or faq-insight (a recurring question). description: At least one of claim or category is required. responses: '200': description: Success headers: RateLimit-Limit: schema: type: integer description: Requests permitted in the current window. RateLimit-Remaining: schema: type: integer description: Requests remaining in the current window. RateLimit-Reset: schema: type: integer description: Seconds until the current window resets. content: application/json: schema: type: object required: - fact properties: fact: type: object required: - id - claim - category description: >- The fields the update reports. Read the fact back from the list endpoint for the rest. properties: id: type: string claim: type: - string - 'null' description: The claim as stored after this call. category: type: - string - 'null' enum: - overview - products - pricing - icp-use-cases - differentiators - competitors - faq - source-digest - custom - objection - faq-insight - null example: fact: id: 68a1fb0a9c41d20014b3f201 claim: >- A SOC 2 Type II report is available on request before a trial. category: faq-insight '400': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '402': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '500': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' security: - basicAuth: [] components: schemas: Error: type: object properties: error: type: object properties: code: type: string message: type: string param: type: - string - 'null' doc_url: type: - string - 'null' request_id: type: - string - 'null' required: - code - message required: - error securitySchemes: basicAuth: type: http scheme: basic description: >- Your API token (`af_…`) as the Basic-auth username, with an empty password. ````