لا محالة يشتمل على نسبة تامة بين الطرفين
Speech necessarily contains a complete relation between two sides.
A complete predicative relation makes the intended utterance complete. A report affirms or denies something of a subject; related structures may also serve non-assertive purposes.
For example:
العِلْمُ نَافِعٌ — Knowledge is beneficial.
العِلْمُ — What the statement concerns.
نَافِعٌ — What is attributed to it.
By contrast, “beneficial knowledge” contains a descriptive relation without asserting the same complete proposition.