What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 is not a soldier. For all x_7, x_7 will read a book or x_7 is a mechanic. For all x_7, x_7 is a soldier if and only if x_7 will take a plane. For all x_7, if x_7 reads a book, then x_7 is taking a plane.
For all x_7, if x_7 were a soldier, then x_7 is taking a plane. For all x_7, if x_7 takes a plane, then x_7 is a soldier. For all x_7, x_7 will not take a plane.