I suppose one could argue that in an absolute philosophical sense there is no causation that we can have knowledge of, only differing amounts of correlation. It

I suppose one could argue that in an absolute philosophical sense there is no causation that we can have knowledge of, only differing amounts of correlation. It would be an extreme position to take but - like solipsism - a difficult one to argue against. (Anyone with an actual background in epistemology care to help me out here?)