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: exists y: R_2(y). forall y: R(y). forall y: R(y) -> S_3(y). forall y: P(y).
forall y: S_3(y) can be inferred via the universal modus ponens rule. forall y: R(y) and P(y) can be inferred via the universal conjunction rule. forall y: P(y) and R(y) can be inferred via the universal conjunction rule. exists y: R_2(y) and R(y) can be inferred via the existential conjunction rule. exists y: R_2(y) and P(y) can be inferred via the existential conjunction rule. exists y: R(y) and R_2(y) can be inferred via the existential conjunction rule. exists y: P(y) and R_2(y) can be inferred via the existential conjunction rule.