The text illustrates inferential assent with:
العالم حادث، والصانع موجود
The world is originated, and the Maker exists.
These are theological propositions for which arguments are developed in traditional kalam. The point here is not to present all those arguments, but to show that reaching a judgment through reasoning is inferential assent.
Merely understanding the meanings of “world,” “originated,” and “Maker” does not by itself supply a proof of these propositions. Supporting premises and reasoning must be considered.