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_14, x_14 is an astronaut. There is at least one x_14 for which x_14 will play squash. For all x_14, x_14 will cook and x_14 will work.
For all x_14, x_14 will cook can be inferred via the universal simplification rule. For all x_14, x_14 will work can be inferred via the universal simplification rule. There is at least one x_14 for which x_14 will play squash and x_14 is an astronaut can be inferred via the existential conjunction rule. There is at least one x_14 for which x_14 is an astronaut and x_14 will play squash can be inferred via the existential conjunction rule.