Consider these two sentences: "I want to buy a phone with a long-lasting battery." and "Which smartphone should I choose if I don't want to charge it frequently?" The wording barely overlaps. No shared phrase, almost no shared vocabulary. Yet anyone reading both instantly recognizes they're about the same underlying thing a phone that doesn't need constant charging. So how does a computer recognize that two pieces of text are talking about similar ideas, when it can't actually "understand" lan...