真偽莫辨

zhen1 wei3 mo4 bian4

can't judge true or false (idiom); unable to distinguish the genuine from the fake, not to know whether to believe (what one reads in the news)

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真偽莫辨|真伪莫辨 [zhēn wěi mò biàn] ► can't judge true or false (idiom); unable to distinguish the genuine from the fake ► not to know whether to believe (what one reads in the news)