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_14, x_14 is an office clerk. For all x_14, if x_14 were a writer, then x_14 is climbing a mountain. For all x_14, if x_14 were an office clerk, then x_14 is a writer.
For all x_14, x_14 is a writer can be inferred via the universal modus ponens rule. For all x_14, if x_14 were an office clerk, then x_14 is climbing a mountain can be inferred via the universal transitivity rule.