What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_18 for which x_18 will not sleep. For all x_18, if x_18 listens to a song, then x_18 is making tea. For all x_18, x_18 will listen to a song or x_18 is an artist. For all x_18, if x_18 were an artist, then x_18 is making tea. For all x_18, x_18 will sleep or x_18 will read a book. For all x_18, if x_18 makes tea, then x_18 is an artist.
For all x_18, if x_18 listens to a song, then x_18 is an artist. There is at least one x_18 for which x_18 will read a book. For all x_18, x_18 will make tea. For all x_18, x_18 is an artist if and only if x_18 will make tea. For all x_18, x_18 will make tea if and only if x_18 is an artist.