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_8, x_8 is an astronaut. For all x_8, if x_8 were a sailor, then x_8 is a poet. For all x_8, if x_8 were an astronaut, then x_8 is playing tennis. For all x_8, x_8 will go running or x_8 is a sailor. For all x_8, if x_8 goes running, then x_8 is a poet.
For all x_8, x_8 will play tennis can be inferred via the universal modus ponens rule. For all x_8, x_8 is a poet can be inferred via the universal disjunction elimination rule.