Consider the following premises. For all x_9, if x_9 were an electrician, then x_9 is drinking water. For all x_9, if x_9 reads a book, then x_9 is drinking water. For all x_9, if x_9 drinks water, then x_9 is reading a book. For all x_9, if x_9 reads a book, then x_9 is an electrician. Can we infer the following from them? For all x_9, x_9 will read a book if and only if x_9 will drink water.
Yes.