 Let’s consider a simple case. Suppose \(A\) is some newly discovered truth, and that \(A\) is compatible with \(K\). Assume that belief revision in such cases is simply a matter of so-called expansion – i.e., conjoining \(A\) to \(K\). Consider the case in which \(K\) also happens to be true. Then any account of truthlikeness that endorses the value of content for truths (e.g. Niiniluoto’s min-sum-average) guarantees that \(K\)*\(A\) is closer to the truth than \(K\). That’s a welcome result, but it has rather limited application. Typically one doesn’t know that \(K\) is true: so even if one knows that \(A\) is true, one cannot use this fact to celebrate progress.