*smile*...I had earlier pondered exactly how to say approximately what Peter T. has done so eloquently.

I am reminded of school of 'art' which allows random flinging of paint or welding bits of junk together and naming it "Found in an Alley".

Perhaps cummings didn't quite mean what he seems to be saying...that unless it is totally different from what everyone else has done, it isn't original & creative.
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One 'thread creep' example which may illustrate what can happen when use of language, whether in poetry of other endeavors gets too clever for it's own good.

In some parts of the African-American community, it is common to try to name a child using a 'unique' name...which is a nice idea, but often ends up just being an awkward variation on LaToya, or other "same but different" categories. Now the same thing is happening in other subcultures in society, with startling results *sigh*(no, 'Dweezle' & 'Moon unit' are not the worst!)

I hope I haven't streched the metaphor 'too' much.