Liar

A lie is an intentionally false statement for the purpose of deception. The practice of communicating lies is called lying, and a person who communicates a lie may be termed a liar. Lies may be employed to serve a variety of instrumental, interpersonal, or psychological functions for the individuals who use them. Generally, the term "lie" carries a negative connotation, and depending on the context a person who communicates a lie may be subject to social, legal, religious, or criminal sanctions.

In certain situations, however, lying is permitted, expected, or even encouraged. Believing and acting on false information can have serious consequences. Therefore, scientists and others have attempted to develop reliable methods for distinguishing lies from true statements.

As defined by Sartre, "bad faith" is lying to oneself. Specifically, it is failing to acknowledge one's own ability to act and determine one's possibilities, falling back on the determinations of the various historical and current totalizations which have produced one as if they relieved one of one's freedom to do so.

A barefaced (or bald-faced) lie is one that is obviously a lie to those hearing it. The phrase comes from 17th-century British usage referring to those without facial hair as being seen as acting in an unconcealed or open way. A variation that has been in use almost as long is bold-faced lie, referring to a lie told with a straight and confident face (hence "bold-faced"), usually with the corresponding tone of voice and emphatic body language of one confidently speaking the truth. Bold-faced lie can also refer to misleading or inaccurate newspaper headlines, but this usage appears to be a more recent appropriation of the term.

A lie which attempts to trick the victim into believing something major which will likely be contradicted by some information the victim already possesses, or by their common sense. When the lie is of sufficient magnitude it may succeed, due to the victim's reluctance to believe that an untruth on such a grand scale would indeed be concocted.

To bluff is to pretend to have a capability or intention one does not actually possess. Bluffing is an act of deception that is rarely seen as immoral when it takes place in the context of a game, such as poker, where this kind of deception is consented to in advance by the players. For instance, a gambler who deceives other players into thinking he has different cards to those he really holds, or an athlete who hints he will move left and then dodges right is not considered to be lying (also known as a feint or juke). In these situations, deception is acceptable and is commonly expected as a tactic.

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