 On the quantitative account, verisimilitude is defined by assigning quantities to contents, where the index of the content of a given theory is its logical improbability, given again that content and probability vary inversely (1963: 233–4). The utilisation of either method of computing verisimilitude shows, Popper argues, that even if a theory \(t_2\) with a higher content than a rival theory \(t_1\) is subsequently falsified, it can still legitimately be regarded as a better theory than \(t_1\), and “better” is here now understood to mean \(t_2\) is closer to the truth than \(t_1\) (1963: 235).