I would like to know these questions
1 Why do people tell lie? ( what causes people to lie?)
2.What are the chemical reactions on the human body when people lie?(
such as face, heart, blood)
3.what is the lie detector? ( how does it work?)

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Clarification of Question by cjcysyh-ga on 03 Dec 2004 21:08 PST

Hello:
I would like to have more sources such as articles, newspapers, books
to answer what the lie detector machines are, why people tell lie and
what chemical reations on the boody when people lie.

Dear pugwashjw-ga
Thank you for your answers, but you did not explain " What are the
chemical reations on the human body when peopole lie?(such as face,
heart and blood) what is the lie detector? (how does it work?)"
May i have some related sources (informations) which are from
articles, books , newspapers and Internet????? Thank you sooooooooooo
much.