Given the following question, let's solve step-by-step. Is the following a factual statement?
"John D. Rockefeller studied medicine and practiced for 20 years."
Options:
- yes
- no

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
John D. Rockefeller was a business man and a philanthropist.
The final answer: no.