For Kempe's triadic relation in question can be stated, in what he calls its obverse form, in perfectly symmetrical terms.
Truth would be a triadic relation, but of a different sort from that expounded by Mr. Russell.
As the total system falls into three parts, so every part of the system follows the triadic law.
triad tri·ad (trī'ād', -əd)
A collection of three things or symptoms having something in common.
The transverse tubule, and the terminal cisternae on each side of it, in a skeletal muscle fiber.