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 listen to a song or x_7 will write a letter. For all x_7, if x_7 were a doctor, then x_7 is sleeping. For all x_7, x_7 is an office clerk. For all x_7, if x_7 writes a letter, then x_7 is sleeping. For all x_7, x_7 will not listen to a song or x_7 is a doctor.
For all x_7, x_7 will write a letter or x_7 is a doctor.