Our bodies could just be rocks on a beach, but whatever it is about us that is capable of observing the output of our own internal thinking (preventing us from just being p-zombies) is not contained within the beach.
Well, thermodynamics is considered pretty fundamental, and the second law of thermodynamics is pretty much all about information. (But your link already touches that.)
People also interpret the 'unitarity' of quantum mechanics to mean that information is preserved.
I think you're being downvoted because you're announcing it as an absolute truth, of which we do not have evidence.
However I am open to your belief (and not on religious or theistic grounds which I assume many people might think you're talking about) because people have (non-religious) experiences that lend to such possibilities.