What an AI detection score means, and what it does not

AI detection reports are now a routine part of how written work is reviewed. They are also widely misunderstood. A score is an estimate from a statistical model, and reading it as a verdict leads to bad decisions in both directions.

What the score measures

An AI detector looks at patterns in the text, such as how predictable the wording is and how sentence length and structure vary, and estimates how much of the document resembles text produced by a language model. The result is usually shown as a percentage of the document, often with the flagged passages highlighted.

It is a measure of resemblance. It is not a record of how the document was written.

Why a score is not proof

• False positives happen. Clear, formal, evenly structured writing can look machine-like to a detector. Writers working in a second language and people who edit heavily are flagged more often than they should be.
• False negatives happen too. AI-generated text that has been rewritten can pass undetected.
• Detectors disagree. The same document can receive different scores from different tools, and from the same tool after an update.

For these reasons, a score should start a conversation, not end one.

When the report shows no percentage

Some reports show a dash or an asterisk instead of a number. This usually means the detector found too little to state a reliable figure, which is common for low scores and for short documents. It is not an error and it is not a finding of AI use. The detail is in the report itself.

If your own work is flagged

1. Open the report and see which passages were highlighted.
2. Gather your evidence: outlines, notes, earlier drafts and the version history in your word processor.
3. Revise the flagged passages so they sound like you. Add your own examples, reasoning and specifics.
4. Explain your process if you are asked. Being able to show how the work developed is far more convincing than any score.

If you used AI tools

Follow the rules of whoever will receive the work. Many institutions allow AI for brainstorming or proofreading but require you to declare it, and some forbid it entirely. When in doubt, ask before you submit, and say what you used.

Check before you submit

Seeing your own AI report first means no surprises. Copyrader gives you an AI report and a plagiarism report for each document you check, so you can review both before anyone else does.