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_5, x_5 will play a game or x_5 is not a sailor. For all x_5, x_5 is a sailor. There is at least one x_5 for which if x_5 makes tea, then x_5 is playing a game.
For all x_5, if x_5 were a sailor, then x_5 is playing a game can be inferred via the universal rewriting rule.