The third argument, that your posthumous nonexistence is no more to be feared than your prenatal nonexistence, also collapses on close inspection. As Nagel observed, there is an important asymmetry between the two abysses that temporally flank your life. The time after you die is time of which your death deprives you. You might have lived longer. But you could not possibly have existed in the time before your birth. Had you been conceived earlier than you actually were, you would have had a different genetic identity. In other words, you would not be you.
