Note, too, that the category of explanatory empiricism suggests a particular view of scientific explanation. It suggests that the causal factors to which an explanation appeals will be hidden aspect of the natural world, facts which lie “beneath,” as it were, the observable reality of things. An explanatory empiricist denies we can know such facts. Aristotle is cautious regarding our ability to know about matters that cannot be directly observed. As he writes, when it comes to “matters inaccessi