SPC George Rudenko,

How would they know if the universe is a hologram unless they are observing it from an outside perspective?

I agree with most of this, but not all, for instance I believe the universe we inhabit is a 3D projection the same universes, what we see before us, which hasn't happened yet; what is happening right this second; and what we've already experienced or what we see behind the "looking glass" of what is past us. It's kinda like seeing what's behind you through use of a mirror, only we're looking past now (Yeah, sounds crazy, but it makes sense in my head). The "image" itself may be 2 dimensional as it is considered a reflection or echo, but it is, in fact, 3 dimensional as we have already experience it "now" so it stands to reason that anything before, during or after was, is and will be one 3D "image" throughout the stream of space and time, and the only thing that makes it 2 dimensional is how we "agree" on the acceptability of what we see... but the decision on how we see or interpret it is ultimately ours. Sorry, would take waaaay to long to write it all here, and I, by no means are near as intelligent as these guys are, but? my theory is my own and makes sense to me! :)