> You are in no position to discern the validity of your "knowledge".
He is the only one who is in that position, because he is the only person who is inside his body. He is physically and mentally a hundred percent in the position to discern the validity of the advice.
> He is the only one who is in that position, because he is the only person who is inside his body
Tell that to everyone who has died due to following quack medicine advice.
Well said. Thank you!