Definition of profession
I agree that reference to copyright should be limited at this point, but given the reference to the CC license above, seems appropriate to mention something here.
So I added a bit, but it seems long and overdone. Hopefully the fact that it's in small type will help learners who aren't ready to understand these concepts yet to gloss over it.
See what you think.
I think it works well, particularly with the small typeface. I tweaked the edit a little because copyright exceptions vary from country to country. All signatories of the Berne Convention agree to the use of quotations -- but the actual implementations may be different in each country -- for example how liberal the exception provisions are for educational purposes.