وَأَثْنَاءُ نُصُوصٍ
And within them are clear textual formulations.
Naṣṣ can refer, depending on context, to a strongly expressed or clear passage. In legal theory the word also has technical uses; its full technical criteria should not be imposed automatically on every occurrence. Here the concern is clarity and force of expression.
Important distinction: Clear wording does not necessarily settle every disputed application. Context, the reach of the evidence and possible qualifications still matter.
A proposition may be stated clearly while its application to an unfamiliar subsidiary case still requires further reasoning.
Scope of meaning: 'Zayd is present' asserts his presence, not his arrival time, route or length of stay. Additional propositions require additional evidence.