What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is fast or x_12 will drink water. For all x_12, x_12 is a doctor if and only if x_12 will cook. There is at least one x_12 for which x_12 is not fast or x_12 will cook. For all x_12, if x_12 were a doctor, then x_12 is drinking water. For all x_12, if x_12 drinks water, then x_12 is a doctor.
There is at least one x_12 for which x_12 will drink water or x_12 will cook. For all x_12, x_12 is a doctor if and only if x_12 will drink water. For all x_12, x_12 will drink water if and only if x_12 is a doctor. For all x_12, if x_12 were a doctor, then x_12 is cooking. For all x_12, if x_12 cooks, then x_12 is a doctor.