Correlativity (taḍāyuf) concerns paired concepts understood in relation to each other, such as fatherhood and sonship.
If Zayd is Amr’s father, Amr is Zayd’s son. The link is not coincidental; fatherhood inherently refers to a corresponding relationship.
But the persons and the relation must be correctly specified. From “Zayd is a father,” one cannot infer that any arbitrary person is his son. The identification of the relata is essential.