I watched a lecture by Polchinski on youtube where he discussed firewalls that exist around blackholes. He said explains that if information is not lost in a black hole then entanglements must be broken. Just as energy is released when chemical bonds are broken, energy is released when entanglements are broken, resulting in a firewall which vaporizes anything getting close to the black hole. So a few questions: 1) Why must be entanglements be broken for information to be conserved? Can anyone give me a basic example to illustrate what i means for an entanglement to be broken? 2) Why would the existence of firewalls mean that Einstein's theory of relativity could be incorrect? 3) Did I make any mistakes in my attempt at paraphrasing Polchinski?