premise: Scientists hold that the only things that can be truly known about the world are those that we can sense and record and so prove . Science aims to produce truth - claims of the sort , " Under X conditions , Y will occur " . Such claims have an incredible plausibility because they can be repeated . The metaphysicians never managed to create anything of this sort ; nothing they ever said could be proved in the real world . What would people say about scientists if they could not prove any of their theories ?
hypothesis: They would say that theories are not true and that the scientists have done a poor job