I heard two people learning about Issur Kolel and Issur Moisif. They kept talking about the Rambam's Nekudah Niflaah. What is it?
If you look in the Tur Yoreh Deah Siman 168 (so too the Shulchan Aruch), you'll notice that there's nothing there. Was it lost sometime in history? It looks like the Shulchan Aruch also didn't have ...
Someone cooked an article of food in his kitchen in 2000. In 2010, he discovered that it was treif Gamur. Between 2000 and 2010 he changed all his cutlary, plates, etc. so that nothing that he owns is ...