The sixth argument evolutionists should avoid is "It is here, so it must have evolved."
I can't imagine anyone ACTUALLY using this argument, it doesn't really make sense. Scientists tend to generalize and assume that whatever organism they are studying has evolved, and so go about their research following that assumption. They do this because evolution has already been proven to be factual, and any experimentation that a scientist does with this assumption is tested and still works out to be factual.
Once again, we know evolution occurs, and we have irrefutable evidence of it.