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To utter a performative is not to make a statement, and therefore the utterance of a performative is neither true nor false.
人生中最伟大的事情就是保持心态年轻。
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...