وَيُبَيِّنُ مُعْضِلَاتِهِ
And clarifies its difficult passages.
Muʿḍil describes a difficulty not settled by a quick literal translation. A term may have multiple senses, an argument may contain an unstated premise, or two statements may appear to conflict. The difficulty must first be identified accurately.
Example: A passage may affirm a perfection of Allah while another denies likeness to creatures. Declaring a contradiction without distinguishing the respects of affirmation and negation would be premature. Affirming perfection and rejecting resemblance can address different aspects.
Resolution succeeds when each statement's meaning and scope become clear.