http://www.wisegeek.com/what-is-blackout-drinking.htm
This article contained information on how blacking out actually affects somones cognative memory. A part i found especcially intresting was when they said “Blackout drinking does not necessarily cause people to lose consciousness or “pass out.” Instead, high alcohol consumption temporarily interferes with the function of the brain, causing the brain to be unable to retain information in short term memory” this means blacking out isent even passing out, blacking out is a much longer process with alot of room to get in trouble before you beacome docile and you wont rember any of it due to being unable to transform short term memories into long term ones under the influence of that much alcohol.