I don't think the intent of AP is to help you get away with "necessary lies", but rather to elucidate and address the abuses that often occur with polygraphy. Forgive me if I am wrong, but the brevity and lack of details in your post arouse some suspicion in me.

I realize the intent isn't to help people like me pass. I do understand that. But I posted because I see a whole lot of threads from people who say they got caught using CMs and very few from people saying they passed with them. My guess is that some of the "got caught" threads were actually written by examiners who want to enforce the idea they can catch you if you try to use them and part that people who pass generally have no reason to come back here.

My story though just for clarity - 

I'm a firefighter. Worked for four years and had a stellar career in a state that does not polygraph firefighters for hiring. My spouse wants to move to a particular state that does polygraph. Before we can move I had to get a job. These jobs are very hard to come by, especially in this particular state, so I have gone through a lot of processes that didn't pan out (hence so many polygraph exams). I finally got picked up a while back and all is back to well.

As for the necessary lies. When I was younger my brother was having a tough time quitting smoking. I wanted to help. He didn't have insurance but he had gotten a bottle of Wellbutrin/Zyban that helped for awhile. He needed more but couldn't afford non-prescription prices. So I bought them from a contact I made and sold them to him for what I paid. So there's buying and selling in one shot. Auto DQ's in departments no matter my intention.

Some will say I'm a horrible human being and shouldn't have been hired. You're free to say that and I'm ok with it. But as for me I am proof these techniques work, am happily and productively employed, and my brother is now a non-smoker.