Confucious said that real knowledge is knowing the extent of one's ignorance.Aristotle and Socrates said the same thing.Is it a skill that can be taught or learned? It probably can, if you have enough of a stake riding on the outcome...

城市的穷人就像树的根：看不见，但对生存至关重要。

The precepts of the law are these: to live honestly, to injure no one, and to give each his due.

教育是点燃火焰，而不是填满容器。