In other words, if you want to learn how to play, just play close attention the next time you go to the doctor. Depending on what your medical issue is, you will usually be taken through evaluation, assessment, diagnosis, and treatment.
In evaluation, the doctor asks questions about your problem. In assessment, they will poke and prod and test you to confirm or deny what they think is wrong with you. Once they’ve figured it out, they will diagnose you with the condition/injury, and finally, they’ll use their tools and techniques to treat you and hopefully fix the problem. Congratulations, you’re a treatment doctor!