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_11, x_11 will climb a mountain or x_11 will not read a book. For all x_11, x_11 will read a book or x_11 is a server. There is at least one x_11 for which x_11 will play tennis or x_11 is not a server. For all x_11, if x_11 climbs a mountain, then x_11 is playing tennis.
For all x_11, if x_11 reads a book, then x_11 is climbing a mountain can be inferred via the universal rewriting rule. There is at least one x_11 for which if x_11 were a server, then x_11 is playing tennis can be inferred via the existential rewriting rule.