Understanding the type of knots that are allowed to be opened on Shabbos.
How to Work with Lotions (e.g., Hand Lotions);
Understanding the logic between mixing horseradish and mayonnaise as opposed to baby cereal, etc.
Does It Make a Difference How One Removes Something Growing from the Body (e.g., Cutting vs. Biting Nails, Cutting vs. Plucking Hair)?;