Consider the following premises. If Jennifer plays tennis, then Linda is bored. If Linda were a lawyer, then Jennifer is playing tennis. For all z, if z were bored, then z is a lawyer. Can we infer the following from them? If is not true that Jennifer is playing tennis if and only if Linda is a lawyer.
 From the fact that for all z, if z were bored, then z is a lawyer we can infer that if Linda were bored, then Linda is a lawyer. From the fact that if Jennifer plays tennis, then Linda is bored, and that if Linda were bored, then Linda is a lawyer we can infer that if Jennifer plays tennis, then Linda is a lawyer. Finally, from the fact that if Jennifer plays tennis, then Linda is a lawyer, and that if Linda were a lawyer, then Jennifer is playing tennis we can infer that Jennifer is playing tennis if and only if Linda is a lawyer, which contradicts that If is not true that Jennifer is playing tennis if and only if Linda is a lawyer. Therefore, the answer is no.