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_8, x_8 is a sailor or x_8 will sleep. Thomas is not listening to a song or Patricia is climbing a mountain. For all x_8, x_8 is not a sailor or x_8 will listen to a song. Thomas is not sleeping or Barbara is drinking water.
For all x_8, x_8 will sleep or x_8 will listen to a song can be inferred via the universal resolution rule.