Our ultimate goal is extensible programming. By this, we mean the construction of hierarchies of modules, each module adding new functionality to the system.

Professors typically spend their time in meetings about planning, policy, proposals, fund-raising, consulting, interviewing, traveling, and so forth, but spend relatively little time at their drawing boards. As a result, they lose touch with the substance of their rapidly developing subject. They lose the ability to design; they lose sight of what is essential; and they resign themselves to teach academically challenging puzzles.

It is evidently necessary to generate and test candidates for solutions in some systematic manner.

Software development is technical activity conducted by human beings.

A good designer must rely on experience, on precise, logic thinking; and on pedantic exactness. No magic will do.

Our ultimate goal is extensible programming. By this, we mean the construction of hierarchies of modules, each module adding new functionality to the system.

Good engineering is characterized by gradual, stepwise refinement of products that yields increased performance under given constraints and with given resources.