Turnitin can flag writing that its model classifies as likely AI generated or AI paraphrased. Its report does not prove who wrote a document. Turnitin itself says the result can be wrong and must not be the sole basis for an adverse decision. Keep your drafts, notes and assignment rules alongside any score.
What the report says
Turnitin's AI Writing Report guide explains the indicator and its limits. For a result below the tool's displayed threshold, the report uses an asterisk rather than a numerical score. Above that threshold, the percentage refers to qualifying text classified by its model, not a probability that the student cheated.
The similarity report serves a different purpose. It compares passages with source material. Neither a similarity match nor an AI indicator by itself determines whether the writer followed the rules. A legitimate quotation can match a source, and a human draft can receive an AI flag.
If your writing is flagged
Start with the written policy for the assignment. Save the report, the submitted file and the date you received the concern. Gather your outline, source notes, version history and earlier drafts. These records show the sequence of your work more clearly than another detector's score.
Ask which passages raised concern and what process the institution follows. Explain your process factually, including any AI help you used if the policy requires disclosure. Do not rewrite a finished document simply to chase a lower score. That can erase the very revision trail that helps establish how the work developed.
What if I paraphrased an AI draft?
Turnitin says its AI writing report can identify text it classifies as AI paraphrased, but the label still does not establish how a particular writer produced a passage. Compare the original draft, the paraphrase and your source notes. If a class or client prohibits AI assistance, changing the wording does not erase that rule. If you paraphrased a source written by someone else, cite the source even when the wording is new. A documented comparison of paraphrasing tools and detectors still needs a person-run test; this page makes no bypass claim.
What remains untested here
This site previously published numerical accuracy and bypass claims for Turnitin without a reproducible test record. Those figures have been removed. We have not run a documented comparison of Turnitin against human writing, AI drafts and edited drafts for this page.
Turnitin's own guidance says its model may misidentify human, AI generated and AI paraphrased text. Its educator guide on false positives recommends a conversation about the work. Those are vendor statements, not a WritersBlock performance test.
What to keep for the next assignment
Use a document editor that retains version history, keep your source notes and save major drafts. The writing provenance guide sets out a practical folder structure. If a score is disputed, the timeline of your work gives a reviewer more to assess than a second automated prediction.
Frequently asked questions
Does a Turnitin AI score prove cheating?
No. Turnitin says the report can misidentify text and should not be the sole basis for adverse action. A reviewer must consider the work and the applicable policy.
What should I do if my own writing is flagged?
Keep the report, drafts, notes and version history. Ask which passages raised concern and follow your institution's review process.