Sirona,
First off enjoy Sagan's book. It is one of my favorites.
On the matter of the Holographic Universe: if it is all just a holograph where is the button I can push that will flood my bank account?
Jokes aside, let's assume that this true and factual and the universe is holographic and materialism is not the end all. Thus we would have to conclude that persons who had their prefrontal cortex severed and were thus cured of their "vision" via lobotomy have either left the hologram or lost the gift to observe it. Do mind altering drugs allow us to see other parts of the holograph or do they just mess up the abusers internals?
You know what? I hope there truly exists a paranormal universe. It would change/add meaning to life for skeptics like me. But then why is that in almost 100% of the cases when scientists examine paranormal claims is the outcome always explained by some other effect - a material one? Sure there have been some unexplained events, but why do humans immediately leap to the "it's paranormal" explanation? History has shown that other events that were previously attributed to paranormal suddenly become explicble by the advances of materialistic study in science.
Sorry I am such an ass...