YES Problem: a(b(x)) -> a(c(b(x))) Proof: Arctic Interpretation Processor: dimension: 3 interpretation: [0 -& -&] [c](x0) = [-& -& 0 ]x0 [0 -& -&] , [0 -& 0 ] [a](x0) = [-& -& -&]x0 [0 0 1 ] , [0 -& -&] [b](x0) = [1 0 0 ]x0 [1 0 0 ] orientation: [1 0 0 ] [0 -& -&] a(b(x)) = [-& -& -&]x >= [-& -& -&]x = a(c(b(x))) [2 1 1 ] [1 0 0 ] problem: Qed