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 not climb a mountain. For all x_11, x_11 will play squash. There is at least one x_11 for which x_11 is a nurse or x_11 will climb a mountain. For all x_11, x_11 is not a nurse or x_11 will read a book.
There is at least one x_11 for which x_11 will climb a mountain or x_11 will read a book can be inferred via the existential resolution rule.