A Form of Logic Suited for Biology

structure to fit a given situation, one makes clear the principal function of theory as an imaging process, that is, as a description of observed reality. Psychologically speaking, there is no possibility of an involvement of the pupil's person as there is in the less precise concept of science's providing "explanations", where assent is essential. One benefit of the structuralist method mentioned by Eddington is the disappearance of the term "existence" from the vocabulary of the scientist. All propositions of science are essentially relational; thus, while all kinds of propositions saying that objects A, B, and C interact with each other can and will occur, no statement occurs that "A exists" except in the sense that A is subject to these interactions. Eddington describes the term "existence" as a "metaphysical" predicate and tells us that the structuralist (his positivist) method is a powerful tool to separate science from philosophy, the latter in its more extreme form of metaphysics.