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_8 for which x_8 is sad. For all x_8, x_8 is an artist if and only if x_8 is a doctor. For all x_8, x_8 is a doctor or x_8 is a lawyer. For all x_8, if x_8 were a lawyer, then x_8 is an artist.
For all x_8, if x_8 were an artist, then x_8 is a doctor. For all x_8, if x_8 were a doctor, then x_8 is an artist.