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_6, if x_6 makes tea, then x_6 is a taxi driver. For all x_6, if x_6 were a lawyer, then x_6 is drinking water. For all x_6, x_6 will drink water or x_6 is not a taxi driver. For all x_6, x_6 will make tea or x_6 is a lawyer.
For all x_6, if x_6 were a taxi driver, then x_6 is drinking water can be inferred via the universal rewriting rule.