Of these four...

We are all part of this ranking, voting machine trying to tabulate, sort, and mathematically evaluate every piece of music we encounter.  If prog archives had its way we would keep voting and listing until we have ranked every single album from the beginning to the end of time into its own discrete position on the progginess spectrum.   We will have a ten dimensional plot measuring how each album fits into the arbitrarily selected PA subgenres.  Maybe ummagumma becomes 10% avant, 40% spacerock, 20% krautrock, 5% electronic.  WHO KNOWS?! We will continue to place a numerical value on everything, forever.  All our choices are meaningless numbers we assign to make us feel like we are saying something meaningful about our music or life itself, and nothing more!