Complicated answer to this one...I used to think not, as everytime I personally would get drunk, I would still be in my right mind, just less inhibited. Then I started working for an alcoholism treatment center and learned a lot. I learned that some people drink so often and their tolerance builds so high that they get to the point where it takes a phenomenal amount of alcohol to appease their desire for it and this leads to a little phenomenon called blackouts. During a blackout, the alcoholic has no earthly idea what they are doing. They are completely out of it and have no recollection the next day of the night's events, kind of like being on auto pilot..."the lights are on, but nobody's home," so to speak. So, at this point in my life I began feeling perhaps it is a suitable excuse to say "I was drunk," but there's a catch. If you are drinking so much you are having blackouts, you really should stop drinking. Alcoholism is a disease that needs to be owned by the person it afflicts. So, in actuality, "I was drunk" should never be an excuse for anything because, even if you are in a blackout and have no control over yourself, you still have the control to not take that first drink at all and avoid the situation altogether.