Trump uses that back out clause to escape detailing many issues… “I don’t want to be predictable” it is his way of saying, I don’t have a clue, and he gets away with it. Just like obama when he gets a question he does not want to answer or one he does not know the answer too, he filibusters the question and rambles on and on like in this case about his friends what they think but he never says what he thinks.