lul k i have mine too. Okay, I'll build a time machine, go back in time and kill my grandfather (father's). But since my grandfather's dead, my father wouldn't be alive and so am I then I won't be able to kill my grandfather so my father's alive and so am I so then I could build a time machine to go back in time to kill my grandfather but I would be gone since my grandfather's dead so my father wouldn't be even be alive and so am I but without me, my grandfather will not be dead and my father and me then I'll build that time machine and go back in time and you know the rest. Or simply I just made that generation be gone.