A sign was erected near a pond: "Pond water is extremely poisonous, and it will die if it enters the water. Otherwise, it will not bear medical expenses!". Which of the following? The same logical error as the problem. ['Mom said to the child, "I love you very much. If you decide to do anything, I will support you, but you must do as I say!".', 'The teacher said, "It\'s not easy for us to draw conclusions about whether this classmate\'s idea is correct. Otherwise, it is unfair to him. ".', 'Teachers must criticize a group of students, and praise a group of students.', 'The Cultural Revolution has its right places and its incorrect places.']