I do not agree that when someone is most truthful when drunk. I father was a drunk and he would say very hurtful things to everyone while smashed. I think everyone has a constant stream of both positive and negative thoughts running through their head. Just because at lot of these thoughts don't really reflect how we are really feeling. For some when they are drunk they lose the ability to choose which thought REALLY reflect how they are feeling. They also loose the abilty to correctly thought related or associate with one person from those related to another or themselves.

I know personally that one think my father taught me was to keep my mouth shut when I'm drunk. I AM NOT more "honest" when drunk.