Yup. the XOR/NOR as it were. The gap. The rotation point between
   two connecting things that goes in a direction neither one of
   the two connecting things could imagine themselves.

   Oil forms in the gap inbetween two moving earth plates. Oh I
   have so many places where this works. But it does. It's all
   about the gaps - and the smaller the gap, the more amazing stuff
   happens within it. Gosh that sounds like a T-shirt quote. ugh.