See my other reformulations; here there is no "feeling of victory", but instead, you have scenarios where all but one of the trillions is spared, the others are killed. Then your expecations - if you didn't know what the other trillion had been told or shown - is that there is 1/trillion chance that the you in 10 seconds will still remember evidence that he has won the lottery.

You can only say the you in 10 seconds will remember winning the lottery with certainty because you know that all the other copies also remember winning the lottery. Their contributions bumps it up to unity.