What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Joseph is not a lawyer. For all x_3, if x_3 were a lawyer, then x_3 is reading a book. For all x_3, if x_3 reads a book, then x_3 is a lawyer.
For all x_3, x_3 is a lawyer if and only if x_3 will read a book. For all x_3, x_3 will read a book if and only if x_3 is a lawyer.