英语脑筋急转弯：美国第22任和第24任总统为何父母相同却并非兄弟？

Question
问题

The 22nd and 24th presidents of the United States of America had the same parents but were not brothers. How can this be possible?
美国第22任和第24任总统父母相同却并非兄弟。这怎么可能的呢？

Answer
答案

They were the same man: Grover Cleveland.
他们是同一个人：格罗弗·克利夫兰。