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: If Robert were a doctor, then Patricia is not an electrician. Patricia is a musician. For all x_14, if x_14 were a musician, then x_14 is an electrician.
There is at least one x for which x is a musician can be inferred via the existential generalization rule.