Please don't take my initial post wrong. I sometimes forget that dry humor doesn't always translate well when you're writing. There's also probably a little of my own exasperation from having heard people say "I don't understand why you don't just quit". Grrrrrrrrrrrr, if it were that simple!
However, I am a lover of logic too with a degree in Computer Sciences and have been mesmerized since the first college course that I took. Down to the pathways of logic as seen in a flowchart. I understand your question. However, alcoholism defies logic. There have been some great leaps and bounds in research of exactly how the brain of an addict works and it's really interesting. Have you ever watched any of the documentaries that are available?