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 will make tea if and only if x_13 is a sailor. Sarah is a sailor if and only if it is cold. For all x_13, x_13 will not make tea. It is cold if and only if Karen is listening to a song.
If Sarah were a sailor, then it is cold. If it is cold, then Karen is listening to a song. If it is cold, then Sarah is a sailor. If Karen listens to a song, then it is cold. For all x_13, if x_13 makes tea, then x_13 is a sailor. For all x_13, if x_13 were a sailor, then x_13 is making tea. For all x_13, x_13 is not a sailor.