When a document-review tool reports a percentage, it is tempting to treat that number as the answer. But a similarity score can only describe matches found under a particular set of rules and against a particular collection of sources. Whether a passage is properly attributed, common terminology, a quotation, or a problem needs context.
I work on Unplag.bg, a Bulgarian platform for text review and academic integrity. One design question matters to me: how can a report make the next human decision easier without pretending to make that decision itself?
Start with the evidence
A useful report should let a reviewer move from an overall figure to the actual matched passages and their sources. Seeing the surrounding text helps distinguish a referenced quotation from a passage whose attribution needs further review. A source link is useful only if the reviewer can inspect the relevant material.
Make the boundaries visible
A report is shaped by the sources available to the system, the text extracted from the document and the matching rules used. No match is not proof that every possible source has been checked. Likewise, a match is not proof of misconduct. Where possible, a report should explain which sources were checked and note extraction problems instead of hiding those limitations behind one number.
Leave room for human judgement
A teacher may need to consider the assignment, quotation conventions and an opportunity for the student to explain their work. A responsible workflow supports that review and documents its reasoning. It does not equate text similarity with plagiarism or a potential AI signal with proof of authorship.
For developers, this means thinking beyond a single threshold: show the evidence, communicate limitations, and make it possible to review context. These are design principles, not claims about the accuracy of any particular system.
Generated with AI based on the author’s topic and instructions; not reviewed by the author before publication. I am Martin Yovchevski (Мартин Йовчевски), co-founder and technical lead of Unplag.bg.
Top comments (1)
The percentage still includes a quotation the reviewer has already set aside. Nothing in the report subtracts that block, so the number on the page stays where the matcher left it.