Which question is central when analyzing ījāz al-qaṣr?

Musāwāt and Ījāz al-Qaṣr: Proportionate Wording and the Rhetoric of Qiṣāṣ

• How many synonyms can replace each word?
• Does every sentence have unsupported omissions?
• What rich meanings are carried by the words actually expressed?
• Is every noun definite?