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: For all x_6, if x_6 were a lawyer, then x_6 is a musician. Karen is a bartender. For all x_6, if x_6 were a bartender, then x_6 is a lawyer.
There is at least one x for which x is a bartender can be inferred via the existential generalization rule. For all x_6, if x_6 were a bartender, then x_6 is a musician can be inferred via the universal transitivity rule.