I remember when my RAH was starting recovery (really abstaining, not actually recovering) and he lied to me about something ridiculous. Totally blatantly lied and the truth was completely obvious. He knew he was caught and had nothing to say or hide. I said "Why would you lie about such a silly thing? There was no reason to lie about it." And his answer summed it all up... "I lie just to lie. I don't even know when I'm telling the truth or lying. I lie when I don't even need to. I lie just to lie." And there it was.