What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is not a writer or x_12 will play tennis. For all x_12, if x_12 were bored, then x_12 is a writer. There is at least one x_12 for which x_12 will climb a mountain or x_12 is bored. For all x_12, if x_12 climbs a mountain, then x_12 is a writer.
There is at least one x_12 for which x_12 is a writer.