it is the third way; neither science nor art, it is creative rationality and rational creativity. designing is seeking balance between the forces we cannot control and the needs and desires we are driven to express.
everyone designs, but professionals benefit from an education and experience that gives them better ways to think and reflect about their work.
there are designerly ways of knowing1 and doing that are universal. even though one may have particular experience in one or another kind of design, a true designer is unconstrained by the limits of discipline and field.