What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_1, if x_1 were a nurse, then x_1 is writing a letter. For all x_1, if x_1 drinks water, then x_1 is writing a letter. There is at least one x_1 for which x_1 will play a game or x_1 is a nurse. For all x_1, if x_1 plays a game, then x_1 is drinking water.
For all x_1, if x_1 plays a game, then x_1 is writing a letter.