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: If it is cold, then Jessica is not a writer. For all x_12, x_12 is a writer and x_12 is a bartender.
For all x_12, x_12 is a writer can be inferred via the universal simplification rule. For all x_12, x_12 is a bartender can be inferred via the universal simplification rule.