You Don't Know What A Lie Is.

An untruth is not a lie.

Lie = to make an untrue statement with intent to deceive. -- Merriam Webster dictionary. Even the dictionaries have the definition wrong.

If I intend to deceive an evil person by telling him an untruth; it is not a lie. Even my statement, below*, which sounds correct on its face, does not totally state what a lie is.

To tell a just person an untruth with the intent to harm an innocent person is a lie.  To tell an untruth to enhance your position or to gain an advantage over another unfairly are lies.

"The truth, the whole truth, and nothing but the truth."

"The truth," = Facts that are personally known by you based on your experiences, your personal observation of the situation, your background and education on the subject.
"The whole truth," = Not leaving out any facts, known to you, that is pertinent to the situation.
"And nothing but the truth," = By not adding information to enhance your position or to cause harm to another person in an attempt to deceive.
If you do not have all three criterias . . . you've just lied.

Then, what is a lie? It's intentionally telling an untruh to do harm.

*My original statement:  September 21, 2015 ·(On my Facebook page).

If you have to change a fact, however slight, to make it sound better; you've just lied.