If the listener attributes a letter to Amr, what does “mā kataba al-risālah illā Khālid” add?

Supplementary Practice 5: Textual Analysis, Scope of Meaning and Rhetorical Judgment

• Only emphasis on the event of writing
• Restricting authorship to Khalid
• Turning the definite letter into an indefinite one
• Increasing the length of the letter