ABSTRACT
Whenever philosophers bother to offer a defense for philosophical naturalism, they typically appeal to the authority of natural science. Science is supposed to provide us with a picture of the world so much more reliable and well-supported than that provided by any non-scientific source of information that we are entitled, perhaps even obliged, to withhold belief in anything that is not an intrinsic part of our our best scientific picture of the world. This scientism is taken to support philosophical naturalism, since, at present, our best scientific picture of the world is an essentially materialistic one, with no reference to causal agencies other than those that can be located within space and time.
