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Then we have the awesomeness of double speak.
Here is a wonderful and short article on Double Speak and how it works.
There is even a yearly award given to the person that had perpetrated double speak (which is NOT a good thing by the way) since 1974.
Past Recipients of the NCTE Doublespeak Award
Here are a few examples of double speak.
Here are some examples of commonly used phrases that are regarded as doublespeak, and the phrase that people actually mean.
"Using the facilities" instead of going to the bathroom
"Downsizing" instead of firing people
"Reducing costs" as opposed to cutting peoples' salaries or the amount of supplies going into work
"Preowned" as opposed to used and possibly beaten up
"Well loved" as opposed to old and raggedy
"Senior citizen" in place of an old person
"Experienced" or "well experienced" in place of old
"Not doing so well" instead of very sick or injured
"Detainee" for a prisoner of war
"Pre-emptive strike" instead of unprovoked attack
"Enhanced interrogation" in place of torture
"Person of interest" instead of a suspect in a crime
"Capital punishment" instead of the death penalty
"Quaint" as opposed to not terribly amusing or beautiful
"Unique" instead of weird
"Take down" in military language instead of saying killing someone
"Restructuring" instead of a reorganization
"Not quite clean" instead of really dirty
"A bit shaky" as opposed to of really poor quality
"Gone to the Lord" instead of died
"Crossed over to the other side" instead of dying or turning to evil
"Gone to greener pastures" instead of leaving
"Doing business" instead of going to the bathroom
"Put to sleep" instead of euthanize
"Ethnic cleansing" instead of genocide
"The underworld" instead of hell
"Lose your breakfast/lunch/dinner" instead of throwing up
"Going a little over the top" as opposed to drinking way too much
"Substance abuse problem" as opposed to drug addiction
"Curvy" in place of fat
"Ill advised" in place of highly thought against or a very bad idea
"Being held back" instead of failing or not performing well
From reading this last, you may notice that doublespeak can also be seen as a euphemism or as being "politically correct."
I would LOVE to add more detail about double speak but seriously all of the links share the same info as the article and author that I have shared above.
I have found that the people who use these techniques to ascertain a liar will begin to see lies even when a person has told nothing but the truth.
The thing is, while this test is helpful and points out what you should be looking for, it isn't the same as doing it every day. If you don't practice you will certainly not be very good at it in a real life scenario. Book knowledge then put it into practice. I would hazard a guess that if we all started practicing this everyday, we could all read people in a much improved manner.
From my own studies, the kinds of behaviors listed in the OP from the two books are actually fairly general and considered normal. A person may feel various emotions that may elicit the behaviors listed here, but it is not a reliable indicator of lying. Even a person’s health conditions can affect the behaviors listed here, but they do not reliably indicate lying. Neither is there any context provided, among other variables. One must also consider any impressions given or manipulation on the part of the questioner, as this is a factor that plays into the responses of the one being questioned.
Also, I found the disclaimer from the CIA (in the link there) about the book written by the former agents to be somehow disconcerting.
It could be said to be more reliable, if one had a 'baseline' knowledge of the person you are studying.