In metaphor by implication, an attribute or action may serve as an attribute of the implied comparand (لازم المشبّه به). But not every such attribute is automatically the rational-metaphor indication, whose specific function is to exclude literal predication.
An attribute may primarily establish an imaginative comparison, or it may also serve as evidence against the plain reading. These functions can coincide, yet are not identical definitions.
Two analytic questions:
1. Which unspoken comparison does this feature evoke?
2. Which apparent attribution does it prevent us from accepting literally?
Keeping both questions in view clarifies the relation between استعارة بالكناية and rational figurative predication.