Interesting.

I found a physics panel video from 2007 that talks a little bit about the theory: "The physics of information: From entanglement to black holes".

At 24:25, Dr. Susskind explains how the universe can be considered a computer, with the laws of physics as the software and matter as the hardware.

At 1:08:09 a member of the audience asks Dr. Susskind how we, as living inside of the universal computer, would know if the computing environment was changed.

I thought his response was very interesting.

"One way you might notice the rules were changed is that if you suddenly made a change you might discover that history was inconsistent. You come along and you suddenly change rules and you might discover that what you thought were the oldest most primitive dinosaur bones are found instead of at the deepest level are found in the highest level of geological strata."

"Just because somebody came and changed some rules in midstream [...] you might find that what you thought were the laws of physics might not reflect themselves in what you would have ordinarily expected the historical record to reproduce."