Note 70 — Front matter
Reading edition
The word underlying is used in the sense of occupying a lower position in the logical hierarchy above indicated. If any one likes to speak of the physico-chemical and the vital as two aspects of one process, he is free to do so. And if he likes to say that the vital is caused by the physico-chemical, let him do so; but he must define the exact sense in which he uses the ambiguous word cause. The word inner in the text means within the organism.