To identify irṣād, ask three questions:
1. Does the earlier wording provide a meaningful clue to the final expression?
2. Does the ending complete the thought rather than merely rhyme with it?
3. If the close were withheld, could a competent hearer reasonably anticipate it or a narrow family of fitting endings?
In the statement denying God's wrongdoing and attributing wrongdoing to the people, the earlier use of the root and the moral contrast strongly prepare the close. Two rhyming words without such preparation would not suffice.
The test concerns functional anticipation, not an inflexible single surface pattern.