not be able to tell the true from the false ❍ 不进行彻底的调查研究，我们将～。We won’t be able to tell the true from the false if we don’t make thorough investigations.
真伪莫辨zhēn wěi mò biàn
莫：不。真的、假的分辨不清。cannot distinguish between real and false, not be able to tell the true from the false, unable to distinguish between real and fake