There&#x27;s also this nice comic on the subject:<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>