In a conference 15 years ago I heard a guy say The problem with software is we don't know what it is. He meant that: we know what is a car or a bridge, we know why and how they do their purpose, not so much with software, which is a strange beast our minds are not ready to grab yet.
There might be something to that. But maybe some construction and automobile engineers feel the same way about bridges and cars respectively. God, I hope not. :)
