孰是孰非 [－－－－]

Jyutping suk6 si6 suk6 fei1
Pinyin shú shì shú fēi

Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 誰是誰非／谁是谁非 (shuíshìshuífēi, “who is right and who is wrong”).
    (syn.) 誰是誰非, 谁是谁非