He was trying, I think, to demonstrate balance and equivalence.
Memo to Cops: Criticisms Aren’t Attacks|Michael Tomasky|December 28, 2014|DAILY BEAST
The equivalence between comic books and Scripture is telling of how seriously canon is taken by these fans.
DC Comics’ Diversity Crisis: Why the Status Quo Rules|Liz Watson|July 20, 2014|DAILY BEAST
The experiment found that the type of atom made no difference to the outcome, perfectly in line with the equivalence principle.
The Equivalence Principle and Testing Einstein With Spaceships and Atoms|Matthew R. Francis|June 4, 2014|DAILY BEAST
At one time a vague relation is supposed which is only true on a large scale, and is a union rather than an equivalence.
The Mind and the Brain|Alfred Binet
From this equivalence the reader can easily compute the value which the intermediate measures would have according to this theory.
Archology and the Bible|George A. Barton
He satisfies himself as to the equivalence of the servicesthat is all.
Harmonies of Political Economy|Frdric Bastiat
The equivalence of services, then, is a different thing from a just appreciation of their utility.
Harmonies of Political Economy|Frdric Bastiat
From all this arises the notion of the equivalence of two forces.
The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method|Henri Poincar
British Dictionary definitions for equivalence
equivalence
equivalency
/ (ɪˈkwɪvələns) /
noun
the state of being equivalent or interchangeable
mathslogic
the relationship between two statements, each of which implies the other
Also called: biconditionalthe binary truth-function that takes the value true when both component sentences are true or when both are false, corresponding to English if and only if . Symbol: ≡ or ↔, as in –(p ∧ q) ≡ – p ∨ – q