chapotraphouse

There's a theory in quantum mechanics that information can never be destroyed, it merely changes forms

Information in the quantum physics context is not the same as information in the normal context. Things can be irretrievably forgotten or destroyed. For example, if you approach a stainless steel block sitting on a concrete pad in an isolated environment, how would you determine how long it's been there? There's no way to tell from simply observing that system. Or for a very different example, the cultural and linguistic practices of many Native American nations are entirely lost to history - much simply cannot refer be determined through the limited means available to us