Yevamos 110a — Who Has the Power to Undo a Marriage? | The Lomdus of אפקעינהו רבנן

Yevamos 110a takes us into one of the most powerful concepts in Shas: אפקעינהו רבנן לקידושין מיניה — Chazal uprooted the Kiddushin. But how can Chazal undo a marriage that was valid מן התורה? This shiur develops the central chakirah: Is every Kiddushin inherently created אדעתא דרבנן, giving Chazal control from within the marriage itself? Or did a complete חלות קידושין already take effect, with Chazal possessing an independent power to uproot it afterward? Through Kiddushei Kesef vs. Kiddushei Bi’ah, הפקר בית דין הפקר, and שויוה רבנן לבעילתו בעילת זנות, we sharpen the issue into classic lomdus: חסרון בחלות or עקירת החלות? From there, the sugya opens into major nafka minas involving למפרע, ממזרות, דעת המקדש, and the limits of using אפקעינהו in cases such as Agunah. At its core, the question is simple but enormous: Is אפקעינהו a דין in קידושין — or a דין in כח חכמים?