What distinguishes the next topic, iṭnāb, from ījāz al-ḥadhf?

Ījāz al-Ḥadhf: Forms of Ellipsis and Evidence for Recovering the Omitted

• Expansion always involves deletion
• Expansion is only pointless repetition
• The two differ only in name
• Iṭnāb adds purposeful wording; ḥadhf omits a recoverable element