Lie great number of lies, depending on how the political wind blows." The question of whether lies can reliably be detected through nonverbal means is a subject of some controversy. Polygraph "lie detector" machines measure the physiological stress a subject endures in a number of measures while he/she gives statements or answers questions. Spikes in stress are purported to indicate lying. The accuracy of this method is widely disputed, and in several well-known cases it was proven to have been deceived. Nonetheless, it remains in use in many areas, primarily as a method for eliciting confessions or employment screening. Polygraph results
Lie a complete fabrication. While a lie is related by a speaker who believes what is said is false, bullshit is offered by a speaker who does not care whether what is said is true because the speaker is more concerned with giving the hearer some impression. Thus bullshit may be either true or false, but demonstrates a lack of concern for the truth which is likely to lead to falsehoods. A cover-up may be used to deny, defend or obfuscate a lie, errors, embarrassing actions or lifestyle, and/or lie(s) made previously. One may deny a lie made on a previous