Scientologists have a specific PRO TR (Professional Training Routine) for training Stdudents to effectively lie and be 100% believable, the Process is called TR-L.

INTELLIGENCE SPECIALIST TRAINING ROUTINE - TR L

Purpose: To train the student to give a false statement with good TR-1. To
train the student to outflow false data effectively.

Position: Same as TR-1. (sitting in office chairs facing each other knees nearly touching)

Commands: Part 1 "Tell me a lie". Command given by coach. Part 2 interview
type 2 WC by coach.

Training Stress: In Part 1 coach gives command, student originates a
falsehood. Coach flunks for out TR 1 or TR 0. In Part 2 coach asks
questions of the student on his background or a subject. Student gives
untrue data of a plausible sort that the student backs up with further
explanatory data upon the coach asking further questions. The coach flunks
for out TR 0 and TR 1, and for student fumbling on question answers. The
student should be coached on a gradient until he/she can lie facilely.

Short example:

Coach: Where do you come from?

Student: I come from the Housewives Committee on Drug Abuse.

Coach: But you said earlier that you were single.

Student: Well, actually I was married but am divorced. I have 2 kids in the
suburbs where I am a housewife, in fact I'm a member of the P.T.A.

Coach: What town is it that you live in?

Student: West Brighton.

Coach: But there is no public school in West Brighton.

Student: I know, I send my children to school in Brighton, and that's where
I'm a P.T.A. member.

Coach: Oh, and who is the Chairman there?..."