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: For all x_5, if x_5 drinks water, then x_5 is taking a plane. For all x_5, x_5 is a musician if and only if x_5 will take a plane. For all x_5, x_5 is a musician or x_5 is a police officer. For all x_5, if x_5 were a police officer, then x_5 is drinking water.
For all x_5, if x_5 were a police officer, then x_5 is taking a plane can be inferred via the universal transitivity rule. For all x_5, if x_5 were a musician, then x_5 is taking a plane can be inferred via the universal biconditional elimination rule. For all x_5, if x_5 takes a plane, then x_5 is a musician can be inferred via the universal biconditional elimination rule.