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