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 sunny, then Jessica is a bartender. It is cold if and only if Jessica is a bartender. If it is cloudy, then it is sunny.
If it is cloudy, then Jessica is a bartender can be inferred via the transitivity rule. If it is cold, then Jessica is a bartender can be inferred via the biconditional elimination rule. If Jessica were a bartender, then it is cold can be inferred via the biconditional elimination rule.