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 curious or x_13 is a musician. Susan is not a musician or it is cold. If Susan were bored, then John is an office clerk. If it is cold, then Elisabeth is playing a game. For all x_13, x_13 is not curious or x_13 is bored. If Elisabeth plays a game, then John is an office clerk.
If it is cold, then John is an office clerk can be inferred via the transitivity rule. For all x_13, x_13 is a musician or x_13 is bored can be inferred via the universal resolution rule.