|Perl: the Markov chain saw|
Look, I pulled up "inability to draw" as simply a thing I can't do. Don't let that undermine the analogy. Some people can't tell when a note is a quarter-pitch off, like I can, so they won't be able to sing as well as me, and clearly won't be an expert singer. There's no amount of training that'll fix that either. In fact, some people are just plain tone-deaf, and can't distinguish notes at all.
In fact, that 'tone deaf' thing fits me about drawing. Whether it's a birth defect or an aquired behavior doesn't matter, but I cannot see pictures. I can't. And I didn't even know that other people could until I was about 20 years old. This is probably why I did so badly in art classes... because when I look at a blank sheet of paper, all I see is a blank sheet of paper. I can hear words, and can feel body movement, but I can't see a durn thing.
If I look around a room, I won't remember a durn thing, unless I tell myself a story about the contents. Then I can remember the story later (or usually a paraphrase), and then I can remember those things.
I don't have internal visual recall, or the ability to hallucinate. I don't. And yes, I've pondered this for the past 20 years.
So perhaps I would have been that third person for your instructor. I'm really that bad. And therefore, I can't draw!