*The eyes give away the dishonest person. Either they move constantly, trying to avoid your view, or they stare at the ground or over your head. A few can look directly at you and lie, but most humans lack that evil ability. That will help guide you if you use it wisely!
*While it is true that one has the right to speak their mind fully, only the most stupid will do so, except under the most dire necessity. Shutting up is most often the better choice.
Memory is the crazy woman that hoards colored rags, and throws away food.