Adelaide is describing the physical mechanics of drunkenness, but what does that have to do with evolution? If evolution was involved in alcoholism, it would serve to weed out the drunks, not perpetuate man's fondness -- so to speak -- for beer and alchohol.
Drunks in the animal kingdom:
http://www.australiangeographic.com....common-drunks/
Do animals find alcohol a social lubricant?
What does boozing have to do with evolution?