> not using any built-in regression functions This is absolute pure silliness. So the guy down the street that can't manufacture a new carburetor isn't a mecha

> not using any built-in regression functions This is absolute pure silliness. So the guy down the street that can't manufacture a new carburetor isn't a mechanic? The doctor that can't create penicillin in his personal office isn't a medical professional? More often than not, the people that create new systems are not the same people that take these concepts and apply them to practical business problem. It takes many kinds of people to help a company grow.