And you see the wiki entry for Brahmi script. What i said is correct. Brahmi appeared as per historians only 500 BCE and that too t is derived from Aramaic they say!!! Kharoshti and Brahmi as oldest scripts of India after the so called Induz valley script(Is it a script??? i think few symbols!!!. And if it is Brahmi ; it proves that Induz valley civilization is Vedic.Remember there is no solid proof to prove that it was Dravidian either, it was the largest river valley civilization but yet the least known!!!!