What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_7 for which if x_7 were a janitor, then x_7 is a soldier. For all x_7, x_7 will go running or x_7 will write a letter. For all x_7, x_7 will write a letter if and only if x_7 is a janitor. For all x_7, if x_7 goes running, then x_7 is a janitor.
There is at least one x_7 for which if x_7 goes running, then x_7 is a soldier. For all x_7, if x_7 writes a letter, then x_7 is a janitor. For all x_7, if x_7 were a janitor, then x_7 is writing a letter.