Poetry is a literary form in which language is used in a concentrated blend of sound and imagery to create an emotional response.
~ Levin (1962)
Poetry is simple to define - a poem is a poem because people consider it a poem.
Simple. Easy to understand. Useless.
Specifically, you need falsifiable results, a way to decide what piece of text is gibberish and what is poetry. Answering the question "Is this art?" is impossible, so Manurung came up with a better definition of poetry in his doctorate thesis An evolutionary algorithm for poetry generation.
He touches upon three dimensions of poetry: poeticness, grammaticality and meaningfulness and finally arrives at a useful definition.
For our experiments to be falsifiable it is useful to focus solely on the technical aspects of poetry i.e. the rhythm and phonemic patterns. If you don't remember - rhythm and metre are the patterns in syllable stress and phonemic patterns are rhymes and such.
There are several types of phonemic patterns (rhyme, alliteration, assonance and consonance), but considering the syllabication problem solved, these are fairly easy to test.
Problems arise when considering figurative language. When is something a metaphor, or just using the wrong word? Quinn (1982) lists a taxonomy of 60 different types of figures of speech, both at the symbolic and the rhetorical level. (can't find a link right now, sorry)
This is a poem produced by an old-style system using purely random functions (ELUAR).
Sparkles of whiteness fly in my eyes, The moan of stars swang branches of trees, The heart of time sings in the snowy night. Seconds of Eternity fly in grass, The Clock of rain turns, Death of the Apples, The Equinox penetrates the words.
Is it a real poem? I don't know, but the experiment doesn't look very falsifiable either.
Any automatic poetry generator bumps into the problem that Readers of [poetry] are prepared to do considerable interpretative work ... In general, the more the audience is prepared to contribute in responding to a work of art, themore chance there is that a computer's performance may be acknowledged as aesthetically valuable (Boden 1990)
The implication being "this shit is simple". But that's abusing the concept of poetic license - something we want to avoid and make life harder for ourselves.
A poem must obey linguistic conventions that are prescribed by a given grammar and lexicon. This is perhaps the most obvious requirement that by definition all natural lan- guage artifacts should fulfill. However, in the context of poetry, it is important to state explicitly, as there is the danger of invoking poetic license (see previous section).
Essentially, we are avoiding purely random strings of words.
For instance: according to _hyperbaton _(a defined figure of speech) the line "I was in my life alone" is allowed, but "In I life was alone my" is just silly.
Simply put, the property of meaningfulness states that a text must intentionally convey some sort of conceptual message that can be interpreted. This holds true for any Natural Language Generation system and despite what first year english majors might think, it must also hold true for poetry.
Keyword being intentionally. The above poem produced by ELUAR primarily hinges on unguided random processes, so it cannot possibly fulfill this requirement.
Finally we reach a useful definition of poetry:
A poem is a natural language artifact which simultaneously fulfills the properties of meaningfulness, grammaticality and poeticness. In other words, a text x is a poem if x ∈ P ∩ G ∩ M.
For this definition to be complete, further specification must be done on defining meaningfulness and poeticness - something I hope the authors have published papers on since 2003, otherwise this is an area I hope to tackle in my thesis.
Since we can measure the technical aspects of poeticness, this definition favors classical poetry - a good thing, since I personally have always found modern poetry to be somewhat contrived in its desperate attempts to be art.
Greeting card poetry serves as a good example of poetry fitting our definition.
Far and away you may be, But the presence of your love is here with me
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