rename_i rule
case LRnegR
res : SubPair
ϕ✝ : Formula
in_ress : res ∈ ∅
⊢ lengthOf res.1 < lengthOf {~ϕ✝} ∧ res.2 = ∅ ∨ lengthOf res.2 < lengthOf {ϕ✝} ∧ res.1 = ∅
case LRnegR
res : SubPair
rule : Formula
in_ress : res ∈ ∅
⊢ lengthOf res.1 < lengthOf {~rule} ∧ res.2 = ∅ ∨ lengthOf res.2 < lengthOf {rule} ∧ res.1 = ∅