What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Karen drives a car, then Susan is playing squash. Joseph is reading a book if and only if Karen is a taxi driver. If Karen were a taxi driver, then Karen is driving a car. If Susan plays squash, then Joseph is reading a book.
If Karen drives a car, then Joseph is reading a book. If Karen were a taxi driver, then Susan is playing squash. If Joseph reads a book, then Karen is a taxi driver. If Karen were a taxi driver, then Joseph is reading a book.