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_2 for which y_2 will read a book or y_2 is not a bartender. For all y_2, y_2 is a bartender or y_2 will not read a book.
For all y_2, if y_2 reads a book, then y_2 is a bartender can be inferred via the universal rewriting rule. There is at least one y_2 for which if y_2 were a bartender, then y_2 is reading a book can be inferred via the existential rewriting rule.