A lot of people are being unecessarily critical of the 1st poster...you don't know him/ her well enough to be so rude. Whoever said they may be 13/ 14 they may be right! I knew f all when i was that age bout the different between a neurologist and neurosurgeon, he/she was just asking a question and everyones jumping down his/her throat. And for some people money is very important. Money might be a real worry in his/her household and he/she wants to make sure with his/her job, thats not the case. So excuse them for asking a, maybe not so valid, but its a question nonetheless, to people HE/SHE prob looks up to! Sorry for the rant, but i felt it had to be said.