What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_6 for which x_6 is an electrician if and only if x_6 is happy. For all x_6, if x_6 were an electrician, then x_6 is a taxi driver. For all x_6, x_6 is rich. For all x_6, if x_6 were a taxi driver, then x_6 is not rich.
For all x_6, x_6 is not a taxi driver. There is at least one x_6 for which if x_6 were an electrician, then x_6 is happy. There is at least one x_6 for which if x_6 were happy, then x_6 is an electrician.