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 a carpenter if and only if x_12 is a lawyer. For all x_12, if x_12 were a writer, then x_12 is a lawyer. For all x_12, x_12 is not an electrician. For all x_12, x_12 will sleep if and only if x_12 is an electrician. For all x_12, if x_12 were a carpenter, then x_12 is sleeping.
For all x_12, if x_12 were a carpenter, then x_12 is a lawyer. For all x_12, if x_12 sleeps, then x_12 is an electrician. For all x_12, if x_12 were a lawyer, then x_12 is a carpenter. For all x_12, if x_12 were an electrician, then x_12 is sleeping. For all x_12, x_12 will not sleep.