 Earlier versions of the Mapping Argument can be found in different places of al-Kindī’s oeuvre (Rescher &amp; Khatchadourian 1965; Shamsi 1975; Adamson 2007: chap. 4; Zarepour 2020b: n. 52). More precise versions of this argument are presented by Avicenna (Marmura 1960; McGinnis 2010: sec. 4; Zarepour 2020b). The strength and accuracy of the versions of the argument these thinkers provide depend, partially at least, on the precision of their construal of the notion of equality of geometric magnitudes. It has been shown that some of Muslim thinkers have pretty detailed accounts of this notion (R. Rashed 2019).