What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_16, x_16 is a nurse or x_16 will play tennis. For all x_16, x_16 will write a letter. For all x_16, x_16 is happy. There is at least one x_16 for which x_16 is not a nurse.
There is at least one x_16 for which x_16 will play tennis. For all x_16, x_16 will write a letter and x_16 is happy. For all x_16, x_16 is happy and x_16 will write a letter.