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 Patricia were an artist, then Charles is a nurse. Patricia is an artist or Jennifer is a lawyer. William is curious. If Jennifer were a lawyer, then Richard is sleeping. If Richard sleeps, then Charles is a nurse.
If Jennifer were a lawyer, then Charles is a nurse can be inferred via the transitivity rule.