Question: Yes / no, is the following a verifiable fact?
"Peppermint undoubtedly and completely cures common headaches and nausea." Let's think first. Step-by-step reasoning:

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
The Peppermint plant can be used to help ease headaches, but is not a known cure for headaches.
So, the final answer is no.