 Now consider the utterance “carts are wood, riding carts is riding wood.” Structurally, this is parallel to the examples about horses. Yet the Mohists reject this utterance, presumably because they think the predicate “riding wood” is a nonsense phrase that is never “so,” since nothing satisfies it. The correct utterance to make in this case is “carts are wood, riding carts is not riding wood.” Rather than “this and so,” then, the cart example is of the kind “this but not so” (shì ér bù rán 是而不然). As with “this and so,” parallels between “this but not so” utterances can be drawn to support further “this but not so” utterances. For example, “carts are wood, riding carts isn’t riding wood” might be cited as a parallel to support “boats are wood, getting in boats isn’t getting in wood” and “houses are brick, living in houses isn’t living in brick.” Since paralleling reliably guides utterances only when used in cases of the same kind, however, dialecticians must carefully distinguish between cases properly treated as “this and so” and those properly treated as “this but not so.” Otherwise, they may draw faulty parallels, such as thinking that, since helping neighbors is helping people, living in houses is living in brick. 