David Marr’s Concept of a Computational
Theory for Understanding an Information Processing Task in the Brain
We cannot understand how a
bird flies by only studying its wings, but need, in addition, an
aerodynamic theory of lift generation by the flow patterns
around the wings.
We cannot understand how a computer works by only studying
the transistors on the circuit boards and their connections, but
need, in addition, concepts of operating system, data structure, and
application programs.