Consider the following premises. For all z, z will take a plane if and only if z will drink water. For all z, z will take a plane or z will not drink water. There is at least one z for which if z drinks water, then z is taking a plane. Can we infer the following from them? If we can, name the inference rule being used: For all z, z will take a plane or z will not drink water.
That is one of the premises. Therefore, the answer is yes.