John: Do you think he really knows what he's talking about?
Mark: I have sometimes some doubts
Matthias: Me too
John: So good, it's not only me
Matthias: do you remember the women he tried to help?
John: yes, sure
Matthias: he only made it worse, and they had to call an ambulance
John: I know, I'm not sure he even studied physiotherapy 
Mark: maybe we should just ask him about his education?
John: I will!
John, Mark and Matthias question his competencies.