interesting analogy, but i think the difference is that we intuitively understand what spanners and nasty dirty oil is, since they're physical objects that we s

interesting analogy, but i think the difference is that we intuitively understand what spanners and nasty dirty oil is, since they're physical objects that we see in daily life. so if i take a car maintenance course, i expect to get dirty. all of this magic inside of the computer is invisible. but you do make a good point, and one that i'll try to address in a future revision!