Steven Pinker and his pursuit of reverse engineering remain humble in his book entitled "How the Mind Works" (1997). Steven writes: "...it omits a third alternative: that some categories are products of a complex mind designed to mesh with what is in nature." on page 57 in the last sentence of the first paragraph. Mind designed to form according to nature or nature designed to form according to mind? "Replace X better than Y with how X works". Hardware from stimuli. To go from hardware to stimuli is "reverse engineering" which, is also known as an illposed (unanswerable) physics/engineering question. Interesting itinerary. The retina displays images of stimuli to the brain for interpretation (in that order) while, Deaf kids devolop the same language patterns of hearing kids. The Chinese say that a baby is already one years young upon birth. Experience could still condition the mind after generations of exposures to the same stimuli. That explains Deaf kids' knowledge of human language structure. With warrant Steven implies that the brain is already programmed to form according to the stimuli. Did the brain originally form knowing what the stimuli would be? I am looking forwards toward the next chapters in Steven's book to see how he characterizes the line of fit for the equation.