Well, suppose there's two reasons his daughter has this assignment.

1. To learn the content of European history. For this, a chatbot is no different than Google, Wikipedia, or a dusty leather almanac. They do a job, they have known limitations, and you can use them deliberately. This doesn't concern me.

2. To learn how to write, capturing complex ideas and presenting them clearly. This is a skill that takes decades to master. It's easy to imagine an AI autocomplete system that handles sentence structure and grammar that becomes a crutch. This seems like a much more serious problem.