   One thing to note is that, in Example 1.1, the revision process yields stable truth values for all three sentences. The notion of a sentence stably true in all revision sequences will be a central notion for the RTT. The revision-theoretic treatment contrasts, in this case, with the three-valued approach: on most ways of implementing the three-valued idea, all three sentences, (7), (8) and (9), turn out to be neither true nor  false.[3]  In this case, the RTT arguably better captures the correct informal reasoning than does the three-valued approach: the RTT assigns to the sentences (7), (8) and (9) the truth-values that were assigned to them by the informal reasoning given at the beginning of the example. 