What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_14, if x_14 were a nurse, then x_14 is cooking. There is at least one x_14 for which x_14 is a nurse if and only if x_14 is a musician. For all x_14, if x_14 were a musician, then x_14 is sad. For all x_14, if x_14 cooks, then x_14 is a nurse.
For all x_14, x_14 is a nurse if and only if x_14 will cook. For all x_14, x_14 will cook if and only if x_14 is a nurse. There is at least one x_14 for which if x_14 were a nurse, then x_14 is a musician. There is at least one x_14 for which if x_14 were a musician, then x_14 is a nurse.