Iḥtirās is a protective qualification that blocks a likely misunderstanding; tatmīm contributes a useful completing detail, without necessarily answering a specific objection; tadhyīl appends an independent statement that gathers or strengthens the meaning already expressed.
DeviceDiagnostic question
IḥtirāsWhich likely misreading is blocked?
TatmīmWhich additional useful detail is supplied?
TadhyīlWhich new clause restates or generalizes the previous claim?
A label should not be inferred from word count or location alone. Purpose and relation to the prior statement determine the stronger analysis.