Are you a logical person? Do you think in Boolean logic terms? Are you often wondering why other people are not as logical as you? Showcase your wry logical side with any of these gifts that asks others to "Be Logical". Featuring logic tesseract Hasse diagram. Note: The Hasse diagram was created by Wikipedia user Lipedia. Make others do a double-take today with an educational logical sense of style! No need to be a math teacher or programmer to enjoy!