((Least))
Yeah, I'm with you on trying to figure out what makes a time a "last time"--guess it's something you only can know in retrospect, so I stopped thinking too much about that.
Of course, now I obsessively think about a lot of other stuff that's just as currently useless to me...
Take care of yourself and don't forget stuff you learned--to get through to sober side,
TB, also trying to do the same