To see this, imagine two computers. One behaves randomly and erratically; it doesn’t have a rational bone in its mechanical body. The other is a deliberating cost-benefit analyzer. Plainly, both are machines: no souls here. Yet they are as different as can be. The question that remains for the psychologist is: What kind of computer are we? Or better than that—since the answer here is plainly both—to what extent are we irrational things and to what extent are we reasoning things?
