What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? William is a lawyer if and only if it is windy. It is not windy. For all x_7, x_7 is poor if and only if x_7 is a lawyer.
If William were a lawyer, then it is windy. If it is windy, then William is a lawyer. William is not a lawyer. For all x_7, if x_7 were poor, then x_7 is a lawyer. For all x_7, if x_7 were a lawyer, then x_7 is poor.