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 it is windy, then Jennifer is a police officer. Sarah is not drinking water. Jennifer is a police officer if and only if Sarah is drinking water. Susan is writing a letter.
Sarah is not drinking water and Susan is writing a letter can be inferred via the conjunction rule. Susan is writing a letter and Sarah is not drinking water can be inferred via the conjunction rule. If Jennifer were a police officer, then Sarah is drinking water can be inferred via the biconditional elimination rule. If Sarah drinks water, then Jennifer is a police officer can be inferred via the biconditional elimination rule. Jennifer is not a police officer can be inferred via the biconditional elimination rule.