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_13, x_13 is an electrician or x_13 will not go running. For all x_13, x_13 is a musician. There is at least one x_13 for which x_13 will go running.
There is at least one x_13 for which x_13 will go running and x_13 is a musician can be inferred via the existential conjunction rule. Some musicians will go running can be inferred via the existential conjunction rule. For all x_13, if x_13 goes running, then x_13 is an electrician can be inferred via the universal rewriting rule.