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 will write a letter if and only if x_7 will work. If Jessica writes a letter, then it is raining. It is not raining.
Jessica is not writing a letter. For all x_7, if x_7 writes a letter, then x_7 is working. For all x_7, if x_7 works, then x_7 is writing a letter.