Originally Posted by
totfit 
In a true Blackout by definition, you will never recall the event(s) for a period of time, whether an hour, day, or days. The memories are never formed, thus can never be recalled.
That's my understanding of it - the body basically gets so overwhelmed with alcohol that it shuts down non-essential processes in an effort to flush out the toxins faster. The memories literally never exist because the brain stops recording during those periods. You can recall before & after, but not during.