AI detection guide
Why Can Human Text Be Flagged as AI?
A detector can highlight patterns in writing, but patterns are not proof of authorship. Human text can look statistically regular for many ordinary reasons.
A score describes the sample, not the author
TextoLab measures structural and statistical characteristics such as sentence rhythm, repetition, paragraph similarity, transitions, and vocabulary distribution. It does not inspect writing history or identify the person or system that produced the words.
That distinction matters: a high pattern score means several measured characteristics were present in this sample. It does not mean there is an equivalent probability that AI wrote it.
Why ordinary human writing may look regular
Formal reports, school assignments, technical instructions, and non-native writing often use stable sentence structures and repeated terminology. Templates, strict briefs, and careful editing can make paragraph lengths and transitions unusually consistent.
- Short samples provide less evidence and make one characteristic look larger.
- Technical vocabulary must repeat when precision matters.
- Introductions and conclusions often follow conventional structures.
- Grammar correction can smooth out natural variation.
Worked example
Two sentences can be entirely human and still repeat a predictable template. The useful response is to inspect the highlighted pattern, not assume an origin.
The plan improves speed. The plan improves access. The plan improves consistency.
The plan speeds up routine work. It also makes the service easier to access, while shared rules improve consistency.
How to interpret a result responsibly
Read the score together with sample length, confidence, findings, and highlighted passages. Check whether the identified repetition or uniformity is expected for the genre. If the result affects a person, never treat it as the sole basis for an accusation or penalty.
For a second perspective, inspect readability and nearby word repetition. These tools answer narrower questions and can reveal whether the regularity comes from clarity, terminology, or accidental repetition.
Questions about this topic
Can a detector prove that a text was written by AI?
No. A deterministic detector reports writing patterns and cannot verify authorship.
Does a low score prove that a text is human?
No. AI text can be edited, mixed, translated, or naturally varied, so low scores are also not proof.
Why are longer samples more useful?
They provide more sentences, paragraphs, and vocabulary, reducing the influence of one isolated characteristic.