I never said they didn't. I just challenge the assumption that they could not have drawn a picture of one unless they walked among them. We draw pictures of them without walking among them, so that doesn't seem to be a very sound assumption.
Okay, point taken, but we have complete skeletons, and scientist and artists (conceptualizing). today.
These stones are said to be at least 400 years and more old!
How could they draw these so anatomically correct hundreds of years before paleontology?
read the articles about the illustrations, There are details they could have known only if they saw them.
ancient stylization is understood, but these etchings are impressive.
whether you accept them or not, they would be a serious blow to current evolutionary thought.