I’m not sure if this is true, likely not, since I saw it in a movie:
At the beginning, when they were establishing the baseline, they asked whether she had ever used marijuana. She said yes, which was a lie, but the interviewer thought it was the truth, because come on, who would’ve admitted that?
The bottom line is, when they’re asking the baseline questions, lie (sometimes).
Again, I don’t know how far this is from the truth, but that show was pretty cool.