YES # Parallel rule labeling (Zankl et al. 2015). Consider the left-linear TRS R: -(+(x(),-(x()))) -> 0() +(x(),-(x())) -> 0() 0() -> -(0()) All parallel critical peaks (except C's) are decreasing wrt rule labeling: phi(-(+(x(),-(x()))) -> 0()) = 3 phi(+(x(),-(x())) -> 0()) = 1 phi(0() -> -(0())) = 2 psi(-(+(x(),-(x()))) -> 0()) = 3 psi(+(x(),-(x())) -> 0()) = 1 psi(0() -> -(0())) = 2