In his book, "Water into Wine," Robert Larmer argues that miracles can occur as divine interventions in the world without involving any change or suspension of the laws of nature. They may do this by the direct creation or destruction of some of the basic ’stuff’ of the universe, while it continues to conform to the unaltered laws. This paper, on the contrary, claims that conservation is essential to the concept of the ’stuff’ as being basic, and that changes in (...) its total quantity therefore undermine the laws of nature just as seriously as any other conflicting evidence. (shrink)