What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Mary is not a doctor. For all x_2, x_2 is curious if and only if x_2 is a doctor. For all x_2, if x_2 were a doctor, then x_2 is curious.
For all x_2, if x_2 were curious, then x_2 is a doctor. For all x_2, if x_2 were a doctor, then x_2 is curious.