Colors, functions, realizers, and roles.Jonathan Cohen -2005 -Philosophical Topics 33 (1):117-140.detailsYou may speak of a chain, or if you please, a net. An analogy is of little aid. Each cause brings about future events. Without each the future would not be the same. Each is proximate in the sense it is essential. But that is not what we mean by the word. Nor on the other hand do we mean sole cause. There is no such thing.