The source also allows parenthetical insertions that are not full independent sentences. A short phrase can add a side remark within a larger construction. Yet not every modifier or grammatical complement is automatically a parenthesis.
To test a proposed iʿtirāḍ, ask:
1. Between which portions of the main statement does it intervene?
2. Does the central grammatical structure substantially remain if the addition is removed?
3. What independent point does the insertion make?
These checks distinguish a useful parenthesis from an essential predicate, object or ordinary modifier.