An example of a second-order relation is this question: In what ways that a cat and dog are alike are a robin and sparrow also alike?

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A second-order relation involves comparing the similarities or relationships between two pairs of objects or entities. In this case, the comparison of how a cat and dog are alike to how a robin and sparrow are alike is a comparison of similarities between two sets of comparisons, making it a second-order relation.

An Example of a Second-Order Relation Is This Question: in What