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 Jennifer drives a car, then Barbara is reading a book. If Barbara reads a book, then Jennifer is driving a car. Jennifer is driving a car if and only if Barbara is reading a book.
Jennifer is driving a car if and only if Barbara is reading a book can be inferred via the biconditional introduction rule. Barbara is reading a book if and only if Jennifer is driving a car can be inferred via the biconditional introduction rule. If Jennifer drives a car, then Barbara is reading a book can be inferred via the biconditional elimination rule. If Barbara reads a book, then Jennifer is driving a car can be inferred via the biconditional elimination rule.