> Are they really visualizing these goofy versions of the machines? If not, why don't they draw them accurately. For two reasons. One. They actually have the

> Are they really visualizing these goofy versions of the machines? If not, why don't they draw them accurately. For two reasons. One. They actually have the wrong mental model of the machines and really imagine them incorrectly. Basically, they've never paid attention to the details, so they get them wrong mentally, but because they aren't sure anyway so they never notice a discrepancy. If they had to rebuild the machine, that's the mess they would probably build unless they stopped to really think about it. Two. They don't know how to draw. One aspect of learning to draw from memory is to learn how to focus on specific detailed areas and then build out. You need to train this skill before you can do it well. > When I draw a simplified bicycle I know it's because I only remember things like "two wheels, pedals and handlebars". Other people think they have a visualization but do not. As you learn to draw, if you have a good imagination, you begin to learn how to interrogate your mental images systematically. To rotate the drawing, focus in on specific details, etc.