Silence

"Oh, I don't understand? It's obvious to me that you are just talking nonsense here and fooling the public!"
The man sneered repeatedly.
"You can find any doctors you like, as long as they have studied medicine. If that doesn't work, I can give you an open class!"
The old man said calmly.
As soon as these words were spoken, there was a lot of laughter from all around.
"Hahahaha, is this old man confused? He actually wants to teach us a lesson!"
"I think he is just talking...