Originally Posted by

**geordief**
thanks

I appreciate the holographic principle is interesting but I was wondering whether the 2-dimensional boundary was in fact 2- dimensional or rather an extreme version of the 3- (or 4 - or >4- ? ) dimensional reality that we can presumably be confident actually exists .

Maybe my point is only nitpicking but has anyone actually arranged matter onto a 2 dimensional plane?

I presume that that plane would be oriented in the pevailing space time curvature (which would itself vary along the "plane") so isn't a 2 dimensional object an approximation only?