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_19, if x_19 were a lawyer, then x_19 is making tea. For all x, x will write a letter and x is a server. For all x_19, x_19 is a lawyer.
For all x_19, x_19 will make tea can be inferred via the universal modus ponens rule. For all x, x will write a letter can be inferred via the universal simplification rule. For all x, x is a server can be inferred via the universal simplification rule.