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All ten synthetic tests

Synthetic fixture · No AI product run

Protected values and offsetting totals

Two amounts change in opposite directions. Their sum still passes, while exact protection fails. This demonstrates why a matching total cannot establish correctness.

Methodology and expected outcome

Load this synthetic test, then choose “Run checks.” Its declared rules are shown below and loaded into editable controls. Changing them changes the question being tested. Expected: Protect amount — failed. Other rules can pass or remain not checked. Review the full outcome list and exact differences.

{
  "key": "id",
  "preserveIds": true,
  "protected": [
    "amount"
  ],
  "deduplicate": false,
  "rowDelta": 0,
  "totals": [
    "amount"
  ],
  "dates": []
}

Products are not yet tested. This case was deliberately constructed to exercise checker behavior; it is not a model comparison, certification or claim of human review. Passing selected constraints does not establish factual or business correctness.

Downloads preserve the fixture values exactly. Formula-like values may execute in spreadsheet programs; inspect untrusted CSV as text or import columns as Text.

Inspect original and edited text

Original

id,amount
001,10.25
002,20.75

Edited

id,amount
001,11.25
002,19.75

1. Choose original and edited CSVs

UTF-8, comma-separated files: up to 1 MiB, 5,000 logical records including the header, 100 columns and 100,000 cells per file. No formulas are executed.

Files run in browser memory with no upload by this checker. The surrounding site may load assets; downloads remain on your device. Read the full method, privacy scope and limitations before checking your own data.