[kelnos]

> pasted it into Word

I'd be surprised if copy/paste carries the revision history, though. Wouldn't they have had to start with the original document (from the other student) and make their edits directly, and then submit that file?

[Gander5739]

I think they mean the revision history in the submitted .docx file showed the copied paper being inserted (as a single change), and then various changes to attempt to hide the plagiarism.