不得而知

Explanation: No way of knowing. 　　Usage: Partial official; as predicate; to not know something 　　Source: Tang Han Yu "competition on the Hill": "Although the Remonstrance and the proposal therefore, people do not know Yan." 　　Examples: Never been to Guangxi, Guangxi, so who did the Government's "Higher adviser", etc., I ~. (Fen "in the newspaper through the slums") Thesaurus:  shrivel, Unknowingly, do not know much about, ignorance ignorance, downright stupidity, obscuration ignorance, faint, a lack of intelligence, Ignorance No education, indistinct, mouth, Mouth Antonym Group:  A column Edward, a person who can shoulder the important task, Look before youleap., circumspect and farseeing; be old in age,but vigorous in mind, Disagree, Pansophy If yu, a man of great wisdom often appears slow-witted, (usually said of calligraphy or writing) As the mind wills, the hand, see and think clearly; be sharp-eyed and clear-headed, clever and deft; be quick-witted and nimble-fingered, cardia Nazarite hair brief, quick of eye and deft of hand, clumsy nimble, think of one and omit ten thousand, foresee with divine accuracy, resource extraordinary, Small drops of water Not disclosed, advisement, Foresight, (recite,etc.) fluently, be masterly in proficiency as pure blue flames when impurities disappear, Eye out quick in action, quick of eye and deft of hand, gumption, Sophisticated, crafty old scoundrel, be circumspect and farseeing, Cong Rui, Acumen Rui Zhi, acumen sagaciousness, ingenuity, application freely, give the game away