So what is Absolute Guard?
Absolute Guard is when blockstun keeps you blocking even if you stop holding Back. If you want an easy demonstration of how it works, just block the first hit of Cerecopter and then let go of the stick. You will keep blocking it because Skullgirls has Absolute Guard.
This sounds more like you're describing "auto-guard" since, when you block an attack, if another move touches you while you're still in blockstun the game will
automatically continue blocking for you and all you need to do is hit down or neutral to block low/high respectively.
Absolute Guard, the technique, as it is in Skullgirls, gives you
absolute coverage against
everything. When properly performed, you can't be hit high/low or thrown or crossed up for the duration of the pushblock animation. This sounds pretty absolute to me.
Also, you do realise that "perfect" and "absolute" mean the same thing, right? Maybe people have been using the wrong term to refer to auto-block this whole time.
Whoever coined the term to refer to omnidirectional blocking obviously didn't know what Absolute Guard was.
People didn't know about Advanced Blocking in Skullgirls prior to Worldjem's video that immediately called it Absolute Guard.
Well, then I guess Mike Z didn't know what Absolute Guard was. :^)
I named it after what he called it when it was first discovered. I made that video on the same day it was discovered to be in SG. We were talking in the IRC when it happened.
I didn't know there was a name for
either of the two mechanics mentioned in your first post, when this was first discovered, but I prefer calling things what they actually are and not just calling it something because other people have been calling it that forever.
You don't get perfect coverage by simply being in blockstun.