+1 to this... on the effects existing on a continuum.<p>There was a great cartoon that the farnam street brain food blog sent out which illustrates this quite well.<p><a href="http:&#x2F;&#x2F;thewireless.co.nz&#x2F;articles&#x2F;the-pencilsword-on-a-plate" rel="nofollow">http:&#x2F;&#x2F;thewireless.co.nz&#x2F;articles&#x2F;the-pencilsword-on-a-plate</a>