The metaphysician analyzes the exact same world that everyone else does, but he analyzes it in light of the absolute division of “is” and “is not”. This makes a difference. Only in this mode of analysis is there no intrinsic limitation on the the extent of the subject studied. The method that explicates such a subject has to be such that it can explicate the full and absolute extent of “is” as full and absolute. Though there is no limitation on the subject with respect to its extent, this necessity to remain unlimited character precludes the metaphysician from being able to consider anything from a specialized experience (like an experiment, or a unique cultural or personal insight, or a gift given by God to some but not all).
The absolute division of he “is” and “is not”, which is given in the principle of contradiction, consists in the impossibility that there could be a non-repugnance of being and non being. The principle is an awareness of our worthiness to judge over all things, and say of them that “being which is, is, and cannot be non-being” or “it is impossible to be and not be simul“. It is a truth about data which cannot be corrected by data. Now clearly since human beings take knowledge from things, to have knowledge that cannot be corrected by data is not a properly human way to know something. Metaphysics is therefore a kind of “borrowed” or “participatory” knowledge.