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: Patricia is a musician and Susan is making tea. It is sunny and William is a doctor.
Patricia is a musician can be inferred via the simplification rule. Susan is making tea can be inferred via the simplification rule. It is sunny can be inferred via the simplification rule. William is a doctor can be inferred via the simplification rule.