对于每一位专家，都会有一个同等的或者完全相反的专家。但对于每一个事实，并不一定就有一个同等的或者相反的事实存在。
For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.
悲伤是我们为爱付出的代价。