Actually I've never really drunk coded (eventhough I can be a bad drinker lol), but one time I was apparently discussing a problem I encountered with a friend of mine and we came up with a solution. All I had to write it down was a reciept from the supermarket though, but I totally forgot about it the next day, until months later when I was cleaning out my wallet and to this day I have no clue what I was trying to tell.