why is it called gezeira maybe takana a gezeira is a term by chazal back in the day, now we dont have that level of ruach kodesh even the gedolim previously didnt have this level so of course the lubavitcher rebbe ,unless it means like by a king and this also he wasnt a king he didnt have all the halachik dinim he wasnt the leader for all of klal yisrael,everyone had and still have their own leaders ayn melech blo am.
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