YES Trs: { i(1()) -> 1(), i(i(x)) -> x, .(1(), x) -> x, .(i(x), x) -> 1(), .(i(y), .(y, z)) -> z, .(x, 1()) -> x, .(x, i(x)) -> 1(), .(y, .(i(y), z)) -> z} Comment: We consider a non-duplicating trs. BOUND: Automaton: { 1_1() -> q3, 1_0() -> q3, i_0(q3) -> q3, ._0(q3, q3) -> q3} Strict: {} Qed