When students prepare for competitive exams, it often feels as though one rejection can define an entire future. Missing a preferred branch, failing to secure admission to a dream university or watching a startup collapse can seem like the end of the road.Aravind Srinivas' journey tells a very different story.Long before he became the co-founder and CEO of Perplexity AI—one of the world's fastest-growing artificial intelligence companies—Srinivas collected a series of disappointments that many would have considered career-ending. He couldn't get into Computer Science at IIT Madras,...