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_16, x_16 will not play tennis or x_16 will read a book. If Robert writes a letter, then Karen is listening to a song. For all x_16, x_16 will not drink water or x_16 will write a letter. For all x_16, x_16 will drink water or x_16 will play tennis. If Robert reads a book, then Karen is listening to a song.
For all x_16, x_16 will play tennis or x_16 will write a letter can be inferred via the universal resolution rule.