The difference between one letter or two letters; writing with a "SHINUI" (not the usual manner).
One letter on top of another letter.
Understanding the Various Different Ways a Flame Might Be Blown Out;
What Type of Actions Are Not Allowed as a דרבנן (Rabbinical Decree) of Zoreh;
חסרון כיס Chesron Kis: A Blank Check, Scrap Paper, Graph Paper, Typing Paper, Etc;