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_7, if x_7 makes tea, then x_7 is running. For all x_7, x_7 will take a plane. For all x_7, if x_7 were a mechanic, then x_7 is making tea. For all x_7, x_7 will not take a plane or x_7 is a mechanic. For all x_7, if x_7 listens to a song, then x_7 is running.
For all x_7, if x_7 were a mechanic, then x_7 is running can be inferred via the universal transitivity rule.