AI detection and plagiarism checking answer different questions. An AI result assesses possible AI involvement in a passage. A similarity report identifies wording that matches material in the sources it checks. Neither report establishes misconduct on its own.
Keeping those questions separate helps you choose a useful next step instead of asking one score to answer everything.
What does an AI detection result tell you?
An AI detection result assesses the text submitted. Some tools provide a document score and highlighted passages. The result does not establish who wrote the text, which tools were used or whether that assistance was allowed.
In AIScan, use the score to decide where to read more closely. Keep the original passage beside the result and refer to our accuracy guidance before drawing conclusions.
What does a similarity report tell you?
A similarity report identifies matching or similar wording in the material that service can check. A match can help you find a source, but you still need to read the passage and see how it was used.
A properly quoted paragraph can produce a match. So can a bibliography, an assignment question or standard wording. Conversely, a report may miss a source outside its coverage. Read the matched passage, its attribution and the original source rather than treating a percentage as a plagiarism verdict.
Four examples that separate the questions
An attributed quotation. A writer includes a quotation with a clear citation. A similarity service may identify its source. That match helps you check the quotation; it does not automatically mean the writer plagiarised it.
An uncited copied paragraph. A paragraph copied from a book raises an attribution question whether or not an AI detector flags it. Investigate the source and the citation.
Generated prose with no matching source. A passage may receive a low similarity score while still containing AI-generated writing. An absence of matches does not establish how it was drafted.
A human draft with a high AI assessment. The writer may have drafts and notes that explain the work. The AI result does not cancel that evidence. Follow a fair review process.
These are illustrative scenarios, not measured results from either type of tool.
Which check should you use first?
Start with the concern you need to resolve. If wording looks copied or a citation is missing, examine the source and use a suitable similarity tool where available. For a question about AI assistance, review the assignment or editorial policy, the document and the writer's explanation.
Before publication, also check facts, dates, quotations, permissions and references. Human-written work can contain errors. Writing that includes permitted AI assistance still needs careful source verification.
Is an AI score a plagiarism score?
No. AIScan's AI score is not a plagiarism report and does not provide a source-match index. Do not describe a high AI score as proof that someone copied text, or a low score as proof that the work is original.
If your organisation requires a particular submission or similarity system, follow that approved workflow. AIScan does not replace an institution's required report.
A practical review sequence
- Read the document and identify the specific concern.
- Check the relevant policy and permitted assistance.
- Inspect the source, citation or highlighted passage.
- Ask the writer to explain their argument and process.
- Record the evidence and unresolved questions before deciding.
Teachers can follow our student-writing workflow. If you are responding to a flag on your own work, see what to do next. To review a passage with AIScan, open the text detector.