I don't know that what you did was stupid, but it's certainly typical of someone who wants to continue drinking.
I agree with trachemys. What you did was simply another version of moderating, something I never attempted, but which is the hallmark of the majority of alcoholics. One of the DSM diagnostic criteria for alcohol dependence is a "persistent desire or unsuccessful efforts to cut down or control alcohol use."
I was under the impression that alcoholics will drink whatever is available, including mouth wash.
More or less, yes. It seems you're looking for a loophole. Doesn't matter that you didn't drink it all at once; you still drank. The fact that you spread out your drinking over more time and in smaller amounts than is typical for you is not evidence that you don't have a problem with alcohol; your experiment only provides evidence that you do.