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 bored if and only if x_13 will go running. If Joseph goes running, then it is late. If it is late, then it is cloudy.
If Joseph goes running, then it is cloudy can be inferred via the transitivity rule. For all x_13, if x_13 were bored, then x_13 is running can be inferred via the universal biconditional elimination rule. For all x_13, if x_13 goes running, then x_13 is bored can be inferred via the universal biconditional elimination rule.