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: There is at least one x_14 for which if x_14 were a musician, then x_14 is taking a plane. For all x_14, if x_14 were a cashier, then x_14 is an office clerk. For all x_14, x_14 will make tea or x_14 is a musician. For all x_14, x_14 is a cashier. For all x_14, if x_14 takes a plane, then x_14 is a server. For all x_14, if x_14 makes tea, then x_14 is a server.
For all x_14, x_14 is an office clerk can be inferred via the universal modus ponens rule. There is at least one x_14 for which if x_14 were a musician, then x_14 is a server can be inferred via the existential transitivity rule.