What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_1, x_1 will read a book if and only if x_1 will drink water. For all x_1, if x_1 were a lawyer, then x_1 is reading a book. There is at least one x_1 for which if x_1 reads a book, then x_1 is a lawyer. For all x_1, x_1 will not drink water.
There is at least one x_1 for which x_1 will read a book if and only if x_1 is a lawyer. There is at least one x_1 for which x_1 is a lawyer if and only if x_1 will read a book. For all x_1, if x_1 reads a book, then x_1 is drinking water. For all x_1, if x_1 drinks water, then x_1 is reading a book. For all x_1, x_1 will not read a book.