 Attorneys in the Western United States to "not focus federal resources in your States on individuals whose actions are in clear and unambiguous compliance with existing state laws providing for the medical use of marijuana".The memorandum was rescinded by Attorney General Jeff Sessions on January 4, 2018.Fold-and-cut theorem

The fold-and-cut theorem states that any shape with straight sides can be cut from a single (idealized) sheet of paper by folding it flat and making a single straight complete cut.