If it wasn't clear (as indicated by others posting in to this thread) you will need to take note that the 2nd rule I cited (although applicable) ...
I'm not trying to be thick here, but how exactly does the 2nd rule apply? If I'm reading correctly, his/her study won't be completed within the period of the visit. Therefore, the rule doesn't apply. Surely studying for 6 months (if he/she is allowed to stay 6 months), leaving for a couple of days (without having finished the courses), and returning for another 6 months (not guaranteed entry, to pick up studies where left off) would be a violation of the rule? If I were the IO, and had to make a determination based on the 2nd rule, I'd send the kid packing...which is ultimately what nearlynaked should be working to avoid...therefore he/she must do this in as straightforward a manner as is possible.
Seems to me that the main issue here is that nearlynaked is wanting to take a course he/she can't possibly finish in the time allowed by a visitor's visa. Therefore, he/she needs to stay longer (get a student visa...and becoming a full time student if neccessary), or not study at all (just enjoy the visit).
Nearlynaked, what are you planning on studying? And where will you be taking the courses? If you're heading to a university, I'd really suggest you consider taking enough classes to qualify as a full-time student and apply for a student visa. An added bonus to that is that you'd be able to work up to 20 hours a week...thus supplementing whatever you're planning on living on once you're over here. It'd just make things easier all around and save you some headache and worry.