 Nonetheless, it does not appear that medieval interest in insolubles was derived directly from these or any other known ancient sources that discuss the Liar. Many of the relevant works were lost (e.g., the works of Chrysippus), while others were never translated into Latin and so were effectively unavailable to the Latin Middle Ages, though things may be different for the Arabic and Byzantine traditions, which are only starting to be studied (see, e.g., Alwishah &amp; Sanson 2009, Gerogiorgakis 2009, El-Rouayheb 2020 and Zarepour 2020). Indeed, it is not at all clear just what it was that prompted medieval interest. One might have supposed that, even if particular theories about the Liar were not transmitted to the Latin West from antiquity, at least formulations of Liar-type paradoxes must have been known and available to stimulate the medieval discussions. In fact, however, there are strikingly few possibilities.