Indian students solved 2,500 years of grammatical errors in Sanskrit that puzzled many scholars at the University of Cambridge. Rishi Rajpopat. One of Pini’s rules, known as the “father of linguistics,” was decoded by Rishi Rajpopat. Furthermore, Rajpopat stated that Pini wanted us to choose the rule that applied to the right side of a word in the event of a dispute between two rules of equal strength.