  This reductionist view of sentient beings was later articulated in terms of the distinction between two kinds of truth, conventional and ultimate. Each kind of truth has its own domain of objects, the things that are only conventionally real and the things that are ultimately real respectively. Conventionally real entities are those things that are accepted as real by common sense, but that turn out on further analysis to be wholes compounded out of simpler entities and thus not strictly speaking real at all. The stock example of a conventionally real entity is the chariot, which we take to be real only because it is more convenient, given our interests and cognitive limitations, to have a single name for the parts when assembled in the right way. Since our belief that there are chariots is thus due to our having a certain useful concept, the chariot is said to be a mere conceptual fiction. (This does not, however, mean that all conceptualization is falsification; only concepts that allow of reductive analysis lead to this artificial inflation of our ontology, and thus to a kind of error.) Ultimately real entities are those ultimate parts into which conceptual fictions are analyzable. An ultimately true statement is one that correctly describes how certain ultimately real entities are arranged. A conventionally true statement is one that, given how the ultimately real entities are arranged, would correctly describe certain conceptual fictions if they also existed. The ultimate truth concerning the relevant ultimately real entities helps explain why it should turn out to be useful to accept conventionally true statements (such as ‘King Milinda rode in a chariot’) when the objects described in those statements are mere fictions.