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 not sleep or x_5 will climb a mountain. For all x_5, if x_5 were a lawyer, then x_5 is a writer. For all x_5, x_5 is not bored or x_5 is a lawyer. There is at least one x_5 for which x_5 will sleep or x_5 is bored. For all x_5, if x_5 climbs a mountain, then x_5 is a writer.
There is at least one x_5 for which x_5 is bored or x_5 will climb a mountain can be inferred via the existential resolution rule.