Some scholars, such as G.R. Hunter,[9] S. R. Rao, John Newberry,[10] Krishna Rao,[11] and Subhash Kak[12] have argued that the Brāhmī script has some connection with the Indus system, but others, such as Iravatham Mahadevan, Kamil Zvelebil and Asko Parpola, have argued that the script had a relation to a Dravidian language.[13][14] F. Raymond Allchin has somewhat cautiously supported the possibility,[15][16] that even many supporters of the theory that Brāhmī probably derives from Aramaic influence consider: that the Brahmi language can have some Indus script influence.[17] Another possibility for continuity of the Indus tradition is in the megalithic culture graffiti symbols of southern and central India (and Sri Lanka), which probably do not constitute a linguistic script but may have some overlap with the Indus symbol inventory.[18][19]