Sounds like he will be fine. I went to law school (and passed the bar) with a stutter. Now, in my case, I did very much care how others saw my stutter, so I wouldn’t recommend the Socratic method to a stutterer unless you’re really seriously about being a lawyer. Same might apply here… med school is very tough (l have a Dr in the family). Main thing is be sure you really dream of being a doctor and aren’t doing it for the money for example