I wish to propose a conjecture. The pineal gland is a full member of our visual sensory equipment that is placed deep inside the brain allowing much of the spectrum to be blocked to enhance sensitivity to the blue end of the spectrum. One immediate result is that it provides the brain with a way to establish a standard for the blue lines for both the pineal gland and the eyes themselves. This then allows correction to be applied to the rest of the spectrum as a form of natural triangulation.