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_2, x_2 will play tennis or x_2 will not play a game. John is playing a game.
There is at least one x for which x will play a game can be inferred via the existential generalization rule. For all x_2, if x_2 plays a game, then x_2 is playing tennis can be inferred via the universal rewriting rule.