What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will work. For all x_9, x_9 is a lawyer or x_9 will write a letter. For all x_9, x_9 is not a lawyer. For all x_9, x_9 will not write a letter or x_9 is a bartender.
For all x_9, x_9 will write a letter.