You are right that Mark has made a funny looking dam, but I would not call it a caricature. So no, I have no interest in your explanation of the word, which would either be erroneous or irrelevant. Unless, of course, you apply it to Mark--but I couldn't agree with that either. Not in this context, anyway. As you may remember, people often take my intensely complicated questions as jokes because they do not realize I am very simple minded and only want to know what I ask. So often this turns out to be a vain hope.
Obviously, the charcoal is wrong because Mark is using computer squiggles to make his picture, in things known as "words." You use charcoal as a medium, not a color--but the correct medium is words. Now recall again what my definition of poem (the generally accepted definition) is. Again, I never said that Mark's poem is not a cartoon, I only said that it was not charcoal (I am glad you got clean glasses out of the deal anyway). I will give you a hint. The same word in Mark's poem answers both my questions about what is most or least like, etc.
I think I exfoliated on the Yamrus thingies after you started answering the question, so I'll bap it back to you for that as well as a stab at the cartoon points.
I am sure you'll want to answer my questions if you wish to support your position, but if not oh well, I'll just leave you be.