For example, Erdosy (1995) noted that cremation was pretty common in 2000 BCE Balochistan (Penano Ghundai II, Mughal Ghundai III, Dabar Kot, Mehi, Su… - George Erdosy

The alternative thesis (Chakrabarti 1977), that iron smelting was developed in the subcontinent, rests on two principal arguments. First, iron ore is found across the length and the breadth of India, outside alluvial plains, in quantities that were certainly viable for exploitation by the primitive methods observable even in this century (Ball 1881; Elwin 1942). Ample opportunities thus existed for experimentation, although given the complexity or iron smelting this is not a conclusive point. The second argument, that the earliest evidence for iron comes from the peninsula and not from the northwest, is much more persuasive, even if better examples than quoted by Chakrabarti can be adduced in support of it. Briefly, while the dating of Phase II of Nagda (the earliest iron bearing level) depends on ceramic analogies, and the stratigraphy of Ahar (another site which is claimed to have produced evidence for iron) is hopelessly muddled, the testimony of radiocarbon dates is instructive.

[Burrow] suggests that Saraswati was a proto-Indoaryan term, originally applied to the present Haraxvaiti when the proto-Indoaryans still lived in northeastern Iran.... It would be just as plausible to assume that Saraswati was a Sanskrit term indigenous to India and was later imported by the speakers of Avestan into Iran. The fact that the Zend Avesta is aware of areas outside the Iranian plateau while the Rigveda is ignorant of anything west of the Indus basin would certainly support such an assertion.

Erdosy testifies that “the principal concern” of scholars (like Witzel) studying South Asian linguistics is to find “evidence for the external origins - and likely arrival in the 2nd millennium BC - of Indo-Aryan languages”;