What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_7 for which x_7 will drink water if and only if x_7 will read a book. For all x_7, x_7 will not take a plane or x_7 will work. For all x_7, if x_7 works, then x_7 is drinking water. For all x_7, x_7 will take a plane or x_7 will read a book.
For all x_7, x_7 will read a book or x_7 will work. There is at least one x_7 for which if x_7 drinks water, then x_7 is reading a book. There is at least one x_7 for which if x_7 reads a book, then x_7 is drinking water.