(Reader submitted this article for sharing) 

By: Rabbi Abraham J. Twerski, M.D

In the Talmud, there are differing opinions on some halachos, and we must conduct ourselves according to the rulings of the poskim. For example, R’ Yosi Hagelili believe that the issur of meat and milk does not apply to fowl, but the psak halachah is otherwise. Anyone who eats butter-fried chicken is a treifniak.

After the early poskim there were the later ones, and because they were in the position to weigh all the earlier opinions, we follow their psak, which is essentially in the Shulchan Aruch. There were great poskim after the Shulchan Aruch, and for all intents and purposes, klal Yisrael has accepted the Mishna Berurah by the Chafetz Chaim as our halachah today.