" ...But that is a method for cowards; the brave man goes out into the hall, comes back with a stick, and says firmly, " You have just deliberately and cruelly exposed my ignorance before this company; I shall, therefore, beat you soundly with this stick in the presence of them all." This you then do to him or he to you, mutatis mutandis, ceteris paribus; and that is all I have to say on Ignorance. "