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: For all z, if z were curious, then z is sleeping. Susan is a cashier or John is curious. John is sleeping or Susan is not a cashier.
If John plays squash, then Susan is a cashier can be inferred via the rewriting rule. If Susan were a cashier, then John is sleeping can be inferred via the rewriting rule.