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 cashier. For all x_6, x_6 is a bartender. For all x_6, if x_6 were a bartender, then x_6 is working. There is at least one x_6 for which if x_6 goes running, then x_6 is not working.
For all x_6, x_6 will work can be inferred via the universal modus ponens rule. For all x_6, x_6 is a cashier and x_6 is a bartender can be inferred via the universal conjunction rule. For all x_6, x_6 is a bartender and x_6 is a cashier can be inferred via the universal conjunction rule.