Saturday, June 8, 2019

talmud gemara - Why is "marriage effective contingent upon the approval of the Sages"?


In Gittin 33a, Kesuvos 3a we learn that Rabbanan have the power to uproot a kiddushin because:



כל דמקדש אדעתא דרבנן מקדש ואפקעינהו רבנן לקידושין מיניה


When a man betroths a woman, he does so under the conditions laid down by the Rabbis, and in this case the Rabbis annul his betrothal.




My question revolves on how to fully understand this principle:


1) Source for it? Is it d'oraisa or d'rabanan?


2) Why does this principle exist by kiddushin/ geirushin specifically?


3) What is the rationale for it existing? We don't extend this principle in other areas like "when a person makes a sale, he does so under the conditions laid down by the Rabbis"




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