[BossingAround]

How do you deal with disputes? One's code is flagged even if the student in question didn't actually cheat. What then? Do you trust tools over the students' word?

In addition, do things like stack overflow and using LLM-generated code count as cheating? Because that is horrible in and of itself, though a separate concern.

[ActualTeacher]

The output of plagiarism tools should only serve as a hint to look at a pair of solutions more closely. All judgement should be derived entirely from similarities between solutions and not some artificial similarity score computed by some program.

[ziddoap]

Unfortunately, this is not really what happens in my experience. The output of plagiarism tools is taken as fact (especially at high school levels). Without extraordinary evidence of the tool being incorrect, students have no recourse, even if they could sit and explain the thought process behind every word/line of code/whatever.

[nsajko]

Lousy high school.

[drapado]

Indeed, this is exactly what I did.

[ablob]

If you talk about the written code to the student in question it should become clear whether it was copied or not.

[drapado]

Well, in this case I noticed the same code copied while grading a project. I used then JPlag to run an automatic check in all the submissions for all the projects. It found many instances where a couple of students did a copy-paste with same variable names, comments, etc. It was quite obvious if you look in detail, and JPlag helped us spot it in multiple files easily.

*edited mobile typos