What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_4, z_4 is an artist if and only if z_4 is poor. If it is late, then Thomas is curious. If Thomas were curious, then John is poor.
If it is late, then John is poor. For all z_4, if z_4 were an artist, then z_4 is poor. For all z_4, if z_4 were poor, then z_4 is an artist.