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_8 for which if x_8 were sad, then x_8 is cooking. For all x_8, if x_8 cooks, then x_8 is fast. For all x_8, x_8 is a cashier if and only if x_8 is sad.
There is at least one x_8 for which if x_8 were sad, then x_8 is fast. For all x_8, if x_8 were a cashier, then x_8 is sad. For all x_8, if x_8 were sad, then x_8 is a cashier.