Machine Learning: Its True Essence

Conceptually, Machine Learning (ML) is the art of teaching machines. Now, obviously teaching is such that when a student is taught by a teacher/tutor, he is capable of facing and answering any question which is either explicitly taught or not. Say, there is a subject covering m number of possible questions. A student is taught n out of the m questions by a teacher (where n is less than m for sure). Now, say there is an examination in which there are x number of questions asked. And, it is found that out of the x questions, there are a questions from the set of n questions being taught and the remaining questions (x-a questions) are questions that are not taught explicitly to the student.