What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it rains, then Jessica is a taxi driver. If Jessica were a taxi driver, then Susan is running. Jessica is a taxi driver if and only if Patricia is playing tennis. Patricia is playing tennis or it is raining.
If it rains, then Susan is running. If Jessica were a taxi driver, then Patricia is playing tennis. If Patricia plays tennis, then Jessica is a taxi driver.