"Theological noncognitivism" is not too far removed from "ignosticism", according to your link. Ignosticism states: the question of the existence of God is meaningless because the term "god" has no coherent and unambiguous definition. Totally valid, to the extent that saying that something that we can't bottle and stopper must be irrelevant helps anyone sleep at night.

I suppose my one point of disagreement is that the poem is philosophically aligned with Questions of God-ness being pointless...the poem doesn't strike me that way (totally subjective of course). And Buckminster Fuller was well known to have undergone a pretty profound mystical experience (whatever that means) that shaped the rest of his life.