What is the implication of “al-inshāʾ ka-l-khabar” near the end of the chapter?

Vocative Address: Calling, Rhetorical Purposes, and Declaratives Used as Directives

• Inshāʾ and khabar are identical in all ways
• Declaratives have no rhetoric
• Inshāʾ can also involve omission, order and some forms of emphasis
• Inshāʾ has no syntax