What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_16, x_16 will work and x_16 is a writer. Elisabeth is working if and only if Robert is a mechanic.
If Elisabeth works, then Robert is a mechanic. If Robert were a mechanic, then Elisabeth is working. For all x_16, x_16 will work. For all x_16, x_16 is a writer.