名不正，則言不順 [－－－－则－－顺]

Jyutping ming4 bat1 zing3 ， zak1 jin4 bat1 seon6
Pinyin míng bù zhèng ， zé yán bù shùn

Definitions (Wiktionary)
  1. proverb
    You must first properly define an issue in order to talk about it intelligently.
    (syn.) 名不正, 言不顺, 言不順