Yevamos 109b: Rav’s Mystery — Where Did the דאורייתא Kiddushin Come From? | Rashba & Chazon Ish

The Gemara gives us Rav and Shmuel — but Rav’s position raises a fascinating question: how can this Kiddushin possibly work? The answer is not one step, but two. We follow Rav carefully and uncover the two separate stages that have to happen for the Kiddushin to take effect. Then, through the Rashba and Chazon Ish, we see why neither stage alone is enough — and how putting the two together suddenly makes Rav’s entire position click. A classic example of a short line in the Gemara hiding a much deeper mechanism underneath.