«غلام زيد راكب وأبوه راكب»
Zayd's servant is mounted, and his father is mounted as well.
This coordinates two judgments, but it does not present the second as a rhetorical branch of the first. Assigning the same predicate to related persons may be mere coordination.
Tafrīʿ, by contrast, makes the following judgment disclose a fresh implication or effect of the first. Sharing a predicate is not the same as deriving a further judgment.