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, x_6 is a nurse or x_6 will not work. For all x_6, x_6 is not a writer or x_6 will work. For all x_6, if x_6 were a bartender, then x_6 is a nurse. There is at least one x_6 for which x_6 is a writer or x_6 is a bartender.
There is at least one x_6 for which x_6 is a bartender or x_6 will work can be inferred via the existential resolution rule. For all x_6, if x_6 works, then x_6 is a nurse can be inferred via the universal rewriting rule.