How would you define AI generated? Consider a homework and the following scenarios:
1. Student writes everything themselves with pen & paper.
2. Student does some research with an online encyclopedia, proceeds to write with pen and paper. Unbeknownst to them, the online encyclopedia uses AI to answer their queries.
3. Student asks an AI to come up with the structure of the paper, its main points and the conclusion. Proceeds with pen and paper.
4. Student writes the paper themselves, runs the text through AI as a final step, to check for typos, grammar and some styling improvements.
5. Student asks the AI to write the paper for them.
The first one and the last one are obvious, but what about the others?
Edit, bonus:
6. Student writes multiple papers about different topics; later asks an AI to pick the best paper.