It's possible that you didn't read my comment carefully enough. I wrote: "Physicists knows the exact reason why energy is conserved and why it might not be con

It's possible that you didn't read my comment carefully enough. I wrote: "Physicists knows the exact reason why energy is conserved and why it might not be conserved." To parse it: 1. exact reason why energy is conserved 2. why it might not be conserved.