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 Karen were a bartender, then Patricia is sleeping. Patricia is sleeping if and only if Karen is a bartender. Karen is not a bartender.
If Patricia sleeps, then Karen is a bartender can be inferred via the biconditional elimination rule. If Karen were a bartender, then Patricia is sleeping can be inferred via the biconditional elimination rule. Patricia is not sleeping can be inferred via the biconditional elimination rule.