An existent:

  Proposition 1) 
	Exists by virtue of what it is

  Proposition 2) 
	Does not exist by virtue of what it is

  Conclusion) 
	By the Law of Non-Contradiction, 
	  Proposition 1 & Proposition 2 cannot both be true (or both false) at the same time and in the same way.

	By the Law of the Excluded Middle, there are 3 types of existents:

	  The first type of existent would be "Necessary", 
	    where the first proposition is true and the second proposition is false, 
	    as the "Necessary existent" exists by virtue of what it is.

	  The second type of existent would be "Impossible", 
	    where the first proposition is false and the second proposition is true, 
	    as the "Impossible existent" does not exist by virtue of what it is.

	  The third type of existent would be "Possible", 
	    where the existent can or can not exist, by virtue of what it is.
	      By the Principle of Sufficient Reason and the Causal Principle, 
	         (which together state that everything must have an explanation for its cause of existence)
	         the cause of the emergence of a Possible existent must be an extrinsic specifier.
	      Therefore, their emergence is due to a cause external to itself,
	    where the existent would be "Dependent" or "Contingent", by virtue of what it is.