It seems that there was a disconnect or upheaval of some kind between the times of the Geonim and the times of the Rishonim and the hakhamim that these two eras contained. Shittoth regarding tefila, ...
The Meiri Berachot 21 (Peri Hadash, Keneset HaGedola and others) writes that in a case of Safek Deorayta Lehumra where one isn't certain after performing the action that he has fulfulled his ...
Mahloket Rishonim how many strings should be used in the Techelet. One string (Raavad) Two strings (Rashi, Tosafot, Rosh and Tur) Half string (Rambam) In a case of an argument like this who would ...