If the doctor asks "what is the difference between a lie and a mistake" is "a lie you knew you were doing it while a mistake you didn't mean to do it" an acceptable answer?

Yes. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines

It’s usually understood that a lie is an intentional misrepresentation or false statement. With a mistake there is no intent to mess represent or do a false statement.