True science will not deny the existence of things because they cannot be weighed and measured.  It will rather lead us to believe that the wonders and subtleties of possible existence surpass all that our mental powers allow us clearly to perceive... We must ignore no existence whatever; we may variously interpret or explain its meanng and origin, but, if a phenomenon does exist, it demands some kind of explanation.  --The Principles of Science, William Stanley Jevons (1835-82)