What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 is a writer if and only if x_5 is a scientist. There is at least one x_5 for which if x_5 were a lawyer, then x_5 is a scientist. For all x_5, x_5 is a writer.
For all x_5, if x_5 were a writer, then x_5 is a scientist. For all x_5, if x_5 were a scientist, then x_5 is a writer.