if you are at 2 energy, the next round is a live, and you use predict, you are left on 4 energy, because predict costs 2 energy to use and gives 2 extra energy, so 2+2+2-2=4, where as if you didn't use predict you would still have 4 energy because a live gives 2 energy on it's own and you already have 2 energy so i's 2+2=4