What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 will work if and only if x_13 is a writer. For all x_13, if x_13 sleeps, then x_13 is a writer. For all x_13, if x_13 were a writer, then x_13 is an electrician. For all x_13, if x_13 were a janitor, then x_13 is sleeping. For all x_13, x_13 will work.
For all x_13, if x_13 sleeps, then x_13 is an electrician. For all x_13, if x_13 were a janitor, then x_13 is a writer. For all x_13, if x_13 works, then x_13 is a writer. For all x_13, if x_13 were a writer, then x_13 is working.