Conceptual models are best thought of as design-tools – a way for designers to straighten out and simplify the design and match it to the users' task-domain, thereby making it clearer to users how they should think about the application.
Time to straighten the record!
A buzzard took the monkey for a ride in the air The monkey thought that everything was on the square The buzzard tried to throw the monkey off his back But the monkey grabbed his neck and said "Now listen, Jack..." "straighten up and fly right straighten up and fly right straighten up and fly right Cool down, papa, don't you blow your top."
I don't know what to do or where to turn in this taxation matter. Somewhere there must be a book that tells all about it, where I could go to straighten it out in my mind. But I don't know where the book is, and maybe I couldn't read it if I found it.warren g. harding