What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 is curious if and only if x_6 will listen to a song. For all x_6, x_6 will listen to a song or x_6 is not a doctor.
For all x_6, if x_6 were a doctor, then x_6 is listening to a song. For all x_6, if x_6 were curious, then x_6 is listening to a song. For all x_6, if x_6 listens to a song, then x_6 is curious.