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, if x_16 writes a letter, then x_16 is sleeping. For all x_16, x_16 will not play a game. For all x_16, if x_16 were a sailor, then x_16 is a poet. For all x_16, x_16 is a sailor if and only if x_16 will sleep. For all x_16, x_16 will play a game if and only if x_16 is a poet.
For all x_16, if x_16 were a sailor, then x_16 is sleeping. For all x_16, if x_16 plays a game, then x_16 is a poet. For all x_16, if x_16 sleeps, then x_16 is a sailor. For all x_16, if x_16 were a poet, then x_16 is playing a game. For all x_16, x_16 is not a poet.