Formal grounding
              th
      On June 26 , Facebook stock cost $65 per share
               quote {
                 date: 2014-06-26,
                 stock: FB,
                 price: $65
               }
                Perceptual grounding
                      th
           On June 26 , Facebook stock rebounded
                    after a bruising swoon
                           ?
                Perceptual grounding
                      th
           On June 26 , Facebook stock rebounded
                    after a bruising swoon
                Perceptual grounding
                      th
           On June 26 , Facebook stock rebounded
                    after a bruising swoon
                   A after B A, B
                  A before B B, A
                  rebounded { sgn(slope) = +1 }
                    bruising { sgn(slope) = -1,
                                 abs(slope) = +2.3 }
               Continuous spaces everywhere
                      th
           On June 26 , Facebook stock rebounded
                    after a bruising swoon
                      A deep red sunset
               Keep a little to the left of the post
        Beat the eggs gently, until they form stiff peaks