What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: Karen is a cashier. It is windy. For all y, if y were a cashier, then y is sleeping.
Karen is a cashier and it is windy can be inferred via the conjunction rule. It is windy and Karen is a cashier can be inferred via the conjunction rule. There is at least one x for which x is a cashier can be inferred via the existential generalization rule.