Some linguists tentatively conclude that Armenian, Greek (and Phrygian) and Indo-Iranian were dialectally close to each other; within this hypothetical dialect group, Proto-Armenian was situated between Proto-Greek (centum subgroup) and Proto-Indo-Iranian (satem subgroup). This has led some scholars to propose a hypothetical Graeco-Armenian-Aryan clade within the Indo-European language family from which the Armenian, Greek, Indo-Iranian, and possibly Phrygian languages all descend. According to Kim (2018), however, there is insufficient evidence for a cladisitc connection between Armenian and Greek, and common features between these two languages can be explained as a result of contact. Contact is also the most likely explanation for morphological features shared by Armenian with Indo-Iranian and Balto-Slavic languages.