是非不分

shìfēibùfēn
unable to distinguish right and wrong (idiom)

CEDICT

to be unable to distinguish right and wrong

Wiktionary

不辨好坏、对错。

重編國語辭典

分辨不出好坏、对错

維基詞典

Entry Composition

1 是非 shìfēi
  1. right and wrong
  2. quarrel
2 不分 bùfēn
  1. not to distinguish; to make no distinction
  2. (LGBT slang) versatile (open to either penetrative or receptive role)

Related entries

是非莫辨 shìfēimòbiàn unable to distinguish right and wrong (idiom)