If you're able to prove something

@Alyosha Possibly, but to stop teaching what is right in order to refute that which is wrong gives the wrong recognition.

@AnnaWasHere Division of labor. Someone can teach the true, depending upon their apptitudes, and someone else can refute the false. Or you can dicide your own time between two projects.

@Convivial Not criticizing ideas is one step higher, but both wisdoms help.

@AnnaWasHere as they say in sport, play the ball, not the man