What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, if x_12 were a police officer, then x_12 is a musician. There is at least one x_12 for which if x_12 writes a letter, then x_12 is a police officer. For all x_12, x_12 will write a letter and x_12 will sleep.
There is at least one x_12 for which if x_12 writes a letter, then x_12 is a musician. For all x_12, x_12 will write a letter. For all x_12, x_12 will sleep.