What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 is a musician if and only if x_13 is a sailor. For all x_13, if x_13 cooks, then x_13 is reading a book. For all x_13, x_13 will not play a game. For all x_13, if x_13 reads a book, then x_13 is a musician. There is at least one x_13 for which if x_13 were a sailor, then x_13 is playing a game.
There is at least one x_13 for which x_13 is not a sailor. For all x_13, if x_13 cooks, then x_13 is a musician. For all x_13, if x_13 were a musician, then x_13 is a sailor. For all x_13, if x_13 were a sailor, then x_13 is a musician.