"In somewhat plainer English, what this means is this: if Carrier Naturalism (or CN) is true, then all minds, and all the contents and powers and effects of minds, are entirely caused by natural phenomena. But if naturalism is false, then some minds, or some of the contents or powers or effects of minds, are causally independent of nature. In other words, such things would then be partly or wholly caused by themselves, or exist or operate directly or fundamentally on their own."
January 1, 1970
https://en.wikiquote.org/wiki/Naturalism_(philosophy)