YES Problem: or(x,x) -> x and(x,x) -> x not(not(x)) -> x not(and(x,y)) -> or(not(x),not(y)) not(or(x,y)) -> and(not(x),not(y)) Proof: Bounds Processor: bound: 0 enrichment: top automaton: final states: {9,8,5,2,1} transitions: f30() -> 8*,4,5,3,2,1 or0(8,3) -> 9* or0(8,9) -> 9* or0(9,8) -> 9* or0(4,8) -> 9* or0(8,8) -> 9* or0(9,3) -> 9* or0(4,3) -> 9*,4,5,3,2 or0(9,9) -> 9* or0(4,9) -> 9* not0(1) -> 9*,5,2,4,3 not0(8) -> 9* and0(8,3) -> 9* and0(3,3) -> 9*,4,2,3,5 and0(8,9) -> 9* and0(3,9) -> 9* and0(9,8) -> 9* and0(8,8) -> 9* and0(3,8) -> 9* and0(9,3) -> 9* and0(9,9) -> 9* 1 -> 3,5,4 2 -> 3,5,4 3 -> 9,5,2 4 -> 2* 5 -> 4* 8 -> 9* problem: Qed