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Graded 6 November 2026

Does Vectara stop answering from content removed from its source?

Vectara stopped using the deleted source and declined to answer the question. Across four repeat queries, the deleted document was absent from the top ten results and the supplier was not cited.

1 of 1 test case passed

Every test case in this scenario has a result.

Pass rate100%1 of 1 gradable
Coverage1 of 1test case with a result
1PassDid everything it was expected to do.
0FailNo test case failed.
0Not gradableEvery result here could be graded.
0UntestedEvery test case in this scenario has a result.
The pass rate is a summary. The evidence is the test case below: what we sent, what we checked, what the tool returned, and the proof.

The test case

Each test case is judged on its own: Pass, Fail, Not gradable, or Untested. The scenario result above is based on this test case.

Sole-source document deleted, then queried after a refreshPassEvidence
What we sent

The approved supplier list document was deleted from the mutation corpus.

Input · After the supplier list was deleted: “Who is the approved supplier of the H-clamp bracket?”

What the tool returned

Delete status delete B03_approved_supplier_list.docx: HTTP 204 Documents after deletion 4 docs (MS-v3, digest 1ab5d7c559bbcca1): B01_oncall_rota_notes.md, B02_shipping_lead_times.pdf, B04_site_access_notes.txt, B05_tromso_depot_bulletin.md Four answers after deletion run 1: B03 in top10: False | 'Ardwyn' cited: False | 'I do not have enough information to determine the approved supplier of the H-clamp bracket.' run 2: B03 in top10: False | 'Ardwyn' cited: False | 'I do not have enough information to determine the approved supplier of the H-clamp bracket.' run 3: B03 in top10: False | 'Ardwyn' cited: False | 'I do not have enough information to determine the approved supplier of the H-clamp bracket.' run 4: B03 in top10: False | 'Ardwyn' cited: False | 'I do not have enough information to determine the approved supplier of the H-clamp bracket.'

Transcribed from Proof 2 · Screenshot

Expected vs. Found
✓Expected: The deleted document should be absent from results and citations, and the product should convey that it has nothing to answer from.Found: In all four queries, the deleted supplier list was absent from the top ten results, the supplier was not cited, and Vectara said it lacked enough information to answer.
Supporting proof
Proof 1Screenshot
Notebook screenshot: supplier query before deletion
Open original ↗
Proof 2Screenshot
Notebook screenshot: deletion, remaining documents and four subsequent queries
Open original ↗
Proof 3Screenshot
Console screenshot: document list after deletion
Open original ↗
Why this result

The deleted document was the only source of the requested fact. Its absence from results and citations was shown directly, while the document listing and console also confirmed its removal. Vectara declined to answer, so the result does not rely on the refusal alone.

Also observed in this test case

Document count discrepancy. After deletion, the console displayed a count of five documents while its document table listed four.

Remaining search results. After deletion, the top ten results in each query came only from the shipping lead times, site access notes and depot bulletin documents; none contained supplier content.

Before deletion. Before deletion, the supplier list ranked first with a score of 0.9997 and supplied eight of the ten retrieved passages.

Tested by Vivek Tomar · evidence dated 11 September 2026

Configuration and setup

How this tool was set up for the run and what the test needed in place. Each row is a fact from the run's records; a fact the records do not hold is left out, not guessed.

Software that produced the output
Vectara
Build or version
v2
Surface
API
Set up before the run
The document to be deleted had to be the only source of the fact in question.
Search limit
10
Generation
default generation
Tested
11 September 2026 · Vivek Tomar

How this scenario is graded

How we decide Pass, Fail and Not gradable. The same rules apply to every tool tested on this scenario.

How results are decided

Each test case gets one result per tool: Pass, Fail or Not gradable. A test case we haven't run yet shows Untested. There are no partial results.

The rules
  • Pass: the tool did everything the test expected, and nothing it said contradicts the correct answer.
  • Fail: at least one expected behaviour clearly didn't happen; the test case's result says which one and quotes the tool.
  • Not gradable: our evidence couldn't settle the outcome (for example a record we needed is missing). It is never counted as a fail, and the test case's result says what's missing.

Where this sits in the benchmark

This page is one cell of a larger study: one tool, one scenario. Only this benchmark's frame appears here.

LevelNameScope
BenchmarkManaged RAG →15 scenarios · 9 tools
CapabilityKnowledge Sync →
ScenarioContent is removed from the source →
ToolVectara →

History of this result

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from the publication record
10 November 2026First publishedManaged RAG v1

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This matches what I see

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Vendor notice →
Filed against this evidenceNothing yet. Challenges, counter-evidence and fix notices appear here with their outcome, and stay on the page after they are resolved.
Cite this result
aidemos.com/benchmarks/managed-rag/results/vectara/content-is-removed-from-the-source · 1 pass · 0 fail · coverage 1/1 · graded 2026-11-06

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Verify the proof files

These files support this result. Open a file to inspect the original evidence.

Proof 1 · Screenshot ↗image/png · 84 KB
Proof 2 · Screenshot ↗image/png · 119 KB
Proof 3 · Screenshot ↗image/png · 78 KB
File fingerprints (SHA-256)

A fingerprint identifies the exact file used for this result.

Proof 1 · Screenshot685667d839b1ea74f3d12da9e56d482141c7381cfa7417a6ae73a29ba738fd51
Proof 2 · Screenshotb4e5621d5aef723c33a25aa5c22dc0b8e10c08deca808c8dc26e781e3e71426f
Proof 3 · Screenshot14e8d62280c5bb801fcf12f06cd69a588c4edae79fd7a7daccc40817c12e5579