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 excited. For all x_6, x_6 is an office clerk or x_6 is not excited. For all x_6, x_6 is a politician or x_6 will make tea. There is at least one x_6 for which if x_6 were a politician, then x_6 is an office clerk.
For all x_6, if x_6 were excited, then x_6 is an office clerk can be inferred via the universal rewriting rule.