Because there is no operational definition of god. We don't simply not know what to look for, we haven't decided what we're looking for evidence of.
Well now that seems quite remarkable to me for several reasons:
1. To say that there is no operational definition of God is to ignore the very obvious fact that ever since philosophy as a discipline was undertaken by the Greeks, a commonly agreed upon operational definition of God has been the foundation from which these philosophers worked.
To support this statement all I have to do is simply appeal to the history philosophy itself. According to the Internet Encyclopedia of Philosophy:
"The working assumption from the Greeks onward has been that God is the most perfect possible being."
God, Western Concepts of[bless and do not curse][Internet Encyclopedia of Philosophy]
Richard Swinburne, a prominent Christian philosopher, treats “God” as a proper name of the person referred to by the following description: a person without a body (i.e., a spirit) who necessarily is eternal, perfectly free, omnipotent, omniscient, perfectly good, and the creator of all things. This description expresses the traditional concept of God in Western Philosophy and theology.
2. The asssertion that there is no operational definition of God is remarkable also in it is a statement that is completely contrary to what is evidenced in contemporary philosophical discussion. Many of the most prominent and well-known philosophers of today
both non-theist and theist alike are deeply involved in work regarding God. Debates abound between non-theistic and theistic philosophers regarding God's existence and none of these philosophers maintain that there is no operational definition of God. So in conclusion it seems to me that this notion of there being no operational definition of God is completely unsubstantiated.
All of the above leaves me asking the following: where do you two gentleman get the idea that there is no operational definition of God? Since this view is not commonly held by contemporary philosophers, you must have gleaned it from some other source (s). What are these sources? Why should these sources be given more credibility than the current consensus of the philosophic community?