Consider the following premises. It is snowing if and only if Patricia is a nurse. It is sunny or Jessica is playing tennis. It is not sunny. It is not snowing. Can we infer the following from them? If we can, name the inference rule being used: Jessica is not playing tennis.
 From the fact that it is snowing if and only if Patricia is a nurse, and that it is not snowing we can infer that Patricia is not a nurse via biconditional elimination. Finally, from the fact that it is sunny or Jessica is playing tennis, and that it is not sunny we can infer that Jessica is playing tennis via disjunctive syllogism, which contradicts that Jessica is not playing tennis. Therefore, the answer is no.