孰是孰非

shúshìshúfēi

synonym of 誰是誰非 /谁是谁非 (shuíshìshuífēi, “who is right and who is wrong”)

Wiktionary

Entry Composition

1 孰 shú
  1. who
  2. which
  3. what
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì
3 孰 shú
  1. who
  2. which
  3. what
=4 非 Fēi abbr. for 非洲 Fēizhōu, Africa
=4 非 fēi
  1. to not be; not
  2. wrong; incorrect
  3. non-; un-; in-; de-
  4. to reproach; to blame
  5. (coll.) to insist on; simply must