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 x for which x will drink water if and only if x will read a book. For all x, x will not read a book.
There is at least one x for which if x drinks water, then x is reading a book can be inferred via the existential biconditional elimination rule. There is at least one x for which if x reads a book, then x is drinking water can be inferred via the existential biconditional elimination rule. There is at least one x for which x will not drink water can be inferred via the existential biconditional elimination rule.