The same restrictive statement can respond to different assumptions. Qaṣr al-qalb overturns an incorrect attribution; qaṣr al-ifrād rules out supposed joint participation; and qaṣr al-taʿyīn identifies the right alternative when the listener is uncertain.
مَا حَضَرَ إِلَّا خَالِدٌ.
Only Khalid attended.
If the listener had asserted 'Zayd attended,' this corrects a mistaken assignment. If they believed both Zayd and Khalid attended, it denies joint participation. If they asked which one attended, it determines the answer. The wording stays the same, while the rhetorical classification depends on the listener’s prior belief.