For instance, "being taller than" is a relation that is true of "Shaquille O'Neal and Ross Perot" and false of "the Empire State building and Mt.
Epistemological relations are often logical connections that obtain between two concepts or ideas, like "entailment."
Relation of Ideas, in the Humean sense, is the type of knowledge that can be characterized as arising out of pure conceptual thought and logical operations (in contrast to a Matter of Fact).
Unlike Hume, Kant denied, in the introduction to his "Critique of Pure Reason", that mathematical truths were analytic.
In Leibniz, relations of ideas are also similar to the so-called Truths of Reason, which are defined as those statements whose denials are self-contradictory.