The Fabric of the Cosmos
| Space, Time, and the Texture of Reality |
... p. 483 - 485.
[p. 483] (That is, each) ... observer living within this universe ... could be completely de-
scribed in terms of physics taking place on the universe's boundary (surface) ... and each ex-
ists as [the projection of] the holographic image of one possible translation.
 And, as with the case of geometric translations described ealier, this provides yet
another hint that spacetime is not fundamental. Not only can the size and shape of spacetime
change in translation from one formulation of a theory to another, equivalent form, but the
number of space dimensions can change, too. More and more of these clues point toward
the conclusion that the form of spacetime is an adorning detail that varies from one formulat-
ion of a physical theory to the next, rather than being a fundamental element of reality. ...
Much as the number of letters, syllables, and vowals in the word cat differ from those
in gato, its Spanish translation, the form of spacetime - its shape, its size, and even the
number of dimensions - also changes in translation. ...
... To any given observer who is using one theory to think about the universe,
form of] spacetime may seem real and indespensable.
But should that observer change the
formulation he or she uses to an equivalent, translated version, what once seemed real and
indespensable neccesarily changes, too. [Yet, this shift also shows
an 'action map' that works
for the observer. Here, too, the 'map' points out the properties of
the world that matter now.]