You're amazed because a training set, largely based on the contents of the internet since about 2011, is able to find words that rhyme with arbitrary word endings?
>Given that the names were made-up and unique, and have zero hits on google
You said it yourself. I just don't see the novelty that a machine learning algorithm, trained on huge amounts of stuff scraped off the internet, can find rhyming words.
That aside, there's an enormous amount of poetry in the training set. Given the relatively strict constraints of the style, there's not much interesting about slotting in words that grammatically make sense.
What I said: that outputting a poem structured around having end rhymes for rhyme made-up words was an obvious counterexample to the claim that the system is just regurgitating its training data. What I did not say: that I was amazed because it rhymed arbitrary words. HTH.
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