I don't say so, but my spade tells me so. - B. B. Lal

What is that ‘something’, some inherent strength? Doubtless it lies in the liberal character of the Indian civilization, which allows for cross-fertilization with other cultures, without losing its own identity. Even time (kala), the great devourer, has stood testimony to the fact that the deep foundations of Indian culture could not be shaken either by internal upheavals, however great may have been their magnitude.... " the soul of India lives on!"

Lal (1997, 9) considers the Sarasvati to have been alive in Kalibangan in the third millennium B.C.E. and dried up at the turn of the millennium: "The Sarasvati dried up around 2000 BC. This clearly establishes that the Rigveda, which speaks of the Sarasvati as a mighty flowing river, has to be assigned to a period prior to 2000 BC. By how many centuries it cannot be said for certain" (Lal, forthcoming).

Here it may perhaps be stated straightaway that so far no unimpeachable evidence has been adduced to prove or even to disprove either of the above-mentioned theories. (about Indo-Aryan invasions or migrations) In such a situation there is little wonder that guesses run wild and pride and prejudice safely prey on them.