MSTEngineering Intelligence

What Does CANNOT_VERIFY Mean in Engineering AI?

CANNOT_VERIFY means the system lacks sufficient authorized evidence or a supported test to issue the requested engineering verdict.

Q20Reviewed 2026-08-152 min read

Direct answer: `CANNOT_VERIFY` is a bounded verdict: the system cannot establish pass or fail for a declared obligation using the available authorized evidence and supported checks. It is different from failure, which means evidence shows the obligation was not met. The verdict should name the missing evidence, unsupported test or conflicting state and identify the next responsible reviewer or input.

How the controlled workflow works

  1. Name the exact obligation under review and the evidence that would be required for pass or fail.
  2. Check whether the evidence is missing, unauthorized, inconsistent, outside tool scope or not testable by the configured verifier.
  3. Return a structured reason code and safe next action without converting uncertainty into a positive result.
  4. Re-evaluate only after a controlled source, rule, tool or engineer decision changes the evidence state.

What evidence should a reviewer inspect?

Review item What it can establish
Obligation and reason code Makes the non-verdict specific, searchable and operationally actionable.
Evidence-gap statement Explains what fact or supported test is missing and why it matters.
Disposition and owner Routes the case to new input, engineering review, unsupported scope or product repair.

Where this answer stops

CANNOT_VERIFY must not be used to hide a known failure, and a high rate of avoidable non-verdicts may reveal poor master data or product limitations. Both require measurement.

Human engineering authority

The customer defines whether a non-verdict blocks the workflow and who may supply or approve the missing evidence.

Related ways people ask this question

  • What does CANNOT_VERIFY mean?
  • Why would an AI engineering system refuse to answer?
  • Is cannot verify the same as failure?

References and claim boundary

  1. NIST AI 100-1 — Artificial Intelligence Risk Management Framework
  2. W3C Recommendation — PROV-DM provenance data model
  3. MST Engineering Intelligence — Evidence model and public status

Limit: External sources support the named standards, platform features or governance concepts. They do not endorse MST or independently validate MST product performance. The public evidence registry governs only the fresh run it identifies; its verdict does not define the implemented product capability status.

FROM THE QUESTION TO YOUR EQUIPMENT

Which task are you trying to improve?

Fit components into a tighter space Explore component positions, port connections and service clearance together.
Assemble another equipment variant Reuse your approved native parts and review the resulting assembly.
Carry P&ID intent into SOLIDWORKS Keep process connections, BOM identity and model revisions aligned.

CONTINUE THE DECISION

How to cite this answer

MST Engineering Intelligence. “What Does CANNOT_VERIFY Mean in Engineering AI?.” Engineering Questions Q20. Reviewed 2026-08-15. https://mst-us.ai/questions/cannot-verify-engineering-ai/

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Describe the workflow and decision boundary without uploading protected P&IDs, CAD, BOM, PDM data, credentials or customer identities. Confidential exchange begins only after identity, NDA and scope review.

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