Redhead goes further than that, and argues that much physics has very little to do with causes.
Essentially, all the parents of the youngest subjects reported that their children did not know redhead and greenhouse.
By around age seven, redhead approaches the 50 % mark as does hotdog, while the novel compounds never approach this level.
Redhead is clearly asserting that metaphysicians should not use the concept of causation in talking about general physical relations.
Redhead, we think justly, accuses those metaphysicians who wish to retain forces of anachronistically clinging to a distinction between natural and forced motion.
Redhead, however, is perhaps looking at special cases.
Redhead notes that classical physics, in which forces played a crucial role, has given way to forms of physical theory in which forces have been eliminated.
Redhead intends skepticism about the idea of causation as a scientific concept altogether, but we need not go this far for the sake of the argument here.
