Nobody knows, but there's a theory which won't answer your question but will put it into a broader context.

没有人知道答案,但有这么个理论,它无法回答你的问题,但却能让你从更宽广的视角来看这个问题

耶鲁公开课 - 心理学导论课程节选

Sandra Layne didn't give a direct answer so the judge put the question to her again.

NPR: Mich. Woman Wraps Up Testimony In Grandson's Death

"I would raise the question whether Romney doesn't struggle a bit with meeting the high expectations that were put on him because... you are your father's son, " Oliker said.

CNN: STORY HIGHLIGHTS