nσ = ⌜nl⌝ , mon<(nσ) ⊦ mon<(rem(nσ, np))
nσ = ⌜nnf⌝ , mon<(nσ) ⊦ mon<(rem(nσ, np))
Used simplifier rules: natstream freely generated by ⌜ ⌝, ⌜ ⌝;;