If we are to understand the interactions of a large number of agents, we must first be able to describe the capabilities of individual agents. - John Henry Holland

Model building is the art of selecting those aspects of a process that are relevant to the question being asked. As with any art, this selection is guided by taste, elegance, and metaphor; it is a matter of induction, rather than deduction. High science depends on this art.

"Doing science," particularly the synthesis of disparate ideas, is not as arcane as it is often made out to be. Discipline and taste play a vital role, but the activity is familiar to anyone who has made some effort to be creative.

Unwrapping occurs when the "solution" is explicitly built into the program from the start.