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_20, x_20 will climb a mountain and x_20 will listen to a song. If it is windy, then Michael is playing tennis. It is windy.
Michael is playing tennis can be inferred via the modus ponens rule. For all x_20, x_20 will climb a mountain can be inferred via the universal simplification rule. For all x_20, x_20 will listen to a song can be inferred via the universal simplification rule.