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: There is at least one y for which if y were a carpenter, then y is reading a book. For all y, if y drives a car, then y is reading a book. For all y, y will drive a car or y is a carpenter.
There is at least one y for which y will read a book can be inferred via the existential disjunction elimination rule.