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PROPOSITION XVIII.
THE RELATIVE IN COGNITION.
There is no mere relative in cognition: in other words, the relative per se, or by itself is, of necessity, unknowable and unknown.
DEMONSTRATION.
The demonstration commences with the definition of the relative, which is nearly identical with that of the phenomenal. "The relative is whatever can be known or conceived only when a correlative is known or conceived along with it." But that which can be known or conceived only when a correlative is known or conceived along with it cannot be known or conceived by itself. Therefore there is no mere relative in cognition; in other words, the relative per se or by itself, is, of necessity, unknowable and unknown.
OBSERVATIONS AND EXPLANATIONS.
1. Although this and the three following propositions are mere repetitions of the four immediately
