Consider the following premises. Jennifer is drinking water if and only if Karen is making tea. If Karen makes tea, then Jennifer is drinking water. If Karen makes tea, then Jennifer is drinking water. Can we infer the following from them? Karen is making tea if and only if Jennifer is drinking water.
 From the fact that Jennifer is drinking water if and only if Karen is making tea we can infer that if Jennifer drinks water, then Karen is making tea. Finally, from the fact that if Karen makes tea, then Jennifer is drinking water, and that if Jennifer drinks water, then Karen is making tea we can infer that Karen is making tea if and only if Jennifer is drinking water. Therefore, the answer is yes.