Contradictions in a document

Find statements in a document that contradict each other, such as different dates or amounts, with both passages quoted.

Input

Document: The project starts on 1 March and ends after 6 months. The budget is 40,000 EUR in total. In section 4 the project ends on 30 November. The total budget of 45,000 EUR includes travel.

Result

A table with type, the two exact passages, a note and the paragraph number.

Long documents written by several people often contradict themselves. This tool looks for different numbers, dates or names for the same thing and for statements that cannot both be true. Both passages are quoted, and the server checks that each occurs word for word.

Your texts, pages and images are processed on our own servers in the EU. Trust Center

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Who it is for

Editors, project teams, tender writers and authors of long reports.

Typical uses

Check a tender or a concept before sending it.
Review terms or guidelines after several edits.
Compare numbers across the sections of a report.

Example

Input

Document: The project starts on 1 March and ends after 6 months. The budget is 40,000 EUR in total. In section 4 the project ends on 30 November. The total budget of 45,000 EUR includes travel.

Result

A table with type, the two exact passages, a note and the paragraph number.

A fixed example, shortened. Real results are AI-generated: please check them.

Price and limits

Price: usually 1–3 credits
Available with: Free, With package
Input limit: One page with up to 32,000 characters of HTML

Privacy

Processed on our own servers in the EU (Poland). Inputs and results are deleted after 7 days (Free) or 30 days (packages), or right after you see the result if you choose not to store them. Images are deleted right after processing.

In the API

Tool name: contradiction_check. Create a job with POST /api/v1/jobs and fetch the result with GET /api/v1/jobs/{id}. You find your API key in your account.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_…" -H "Content-Type: application/json" \
  -d '{"tool": "contradiction_check", "url": "https://example.com/"}'

Full API documentation →

Questions and answers

Are the quotes reliable?

Each quote is checked by the server: it must occur word for word in the document. Items without such a passage are dropped and counted.

Are all contradictions found?

No tool can promise that. The result is a review aid for reading the document.

Does it compare two documents?

It checks one text. Two documents can be pasted one after the other, or the compare tool can be used.

Is my text stored?

Only as long as needed: 7 days on Free, 30 days with a package – or not at all if you choose not to store it. Processing happens on our own servers in the EU (Poland).

Can I use the result right away?

Results are AI-generated. Please read them before you publish or send them.