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 Jessica drinks water, then it is raining. It is not raining. Jessica is drinking water if and only if Michael is reading a book. If it rains, then Jessica is drinking water.
Jessica is not drinking water can be inferred via the modus tollens rule. Jessica is drinking water if and only if it is raining can be inferred via the biconditional introduction rule. It is raining if and only if Jessica is drinking water can be inferred via the biconditional introduction rule. If Jessica drinks water, then Michael is reading a book can be inferred via the biconditional elimination rule. If Michael reads a book, then Jessica is drinking water can be inferred via the biconditional elimination rule.