Thanks, Raemon, this is inspiring. It reflects my experience learning to draw as an undergraduate, many years ago. I have not drawn much since college, but I do recall vividly the experience of, "Holy crap, is that what a person really looks like?!?" upon first producing a half-decent quick figure drawing. I eventually developed a pretty decent drawing ability, which has atrophied quite severely in the intervening years. The experience definitely influenced my overall thinking though -- I'm very aware that my brain is not telling me the actual shapes and relations that correspond to the light hitting my eyeballs, unless I take the trouble to consciously examine that first-order sensory input. And taking that idea to the meta-level, realizing that my mental models of other things might be wrong in hard-to-notice ways, and taking the trouble to at least try to notice them, has been a valuable skill. (Even if not always applied rigorously.) So I think this is absolutely a valuable sequence; and it's prompted me to try drawing again, too.