How Did Brahmi Encroach the Art D Fromaramaic?

Oke wamse says the claim that brahmi encroached on art d fromaramaic is 'complete fabrication, complete lies' He believes calculus was discovered in india at least a century before these two individuals existed. The earliest known evidence of calculus comes from the carala school of mathematics - more than a century before newton and libnitz claimed to have made this discovery.