What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: w. Q_3(a_16) <-> W(d). forall y: ~W(y). forall x_16: Q_3(x_16) <-> S_16(x_16).
Q_3(a_16) -> W(d) can be inferred via the biconditional elimination rule. W(d) -> Q_3(a_16) can be inferred via the biconditional elimination rule. forall x_16: Q_3(x_16) -> S_16(x_16) can be inferred via the universal biconditional elimination rule. forall x_16: S_16(x_16) -> Q_3(x_16) can be inferred via the universal biconditional elimination rule.