Ontology of God--Theological Noncognitivist View

[Knight]

As my first real post outside of introductions, I shall post my theological noncognitivist view in the form of a challenge:

I challenge any theist to provide a coherent ontology of God. Theists (especially Christians) seem to know that God is omnipotent, omniscient, and omnipresent, but these attributes cannot be applied to any known being.

Theists tend to first define God and then apply it to the God they believe in. This is illogical, as how can one derive the attributes of a thing without first observing the thing being defined?