Q: If I go back in time and kill my grandfather, will I still exist?
A: Ah, the classic "Grandfather Paradox"! Well, let us just say that you're not exactly... "alive" in the classical sense. More like... "temporarily displaced from the timestream". You'll still exist, but in a temporal limbo, reliving the same day over and over. It's like being stuck in a time loop of Groundhog Day, but with more angst.
Q: Can I travel back in time and prevent the rise of a certain powerful dictator?
A: Ha! You think you can stop the rise of a powerful dictator that easily? Good luck with that. Just remember, every time you try, you'll just create a new timeline, and someone else will try to take his place. It's like a never-ending game of "Temporal Whack-a-Mole". But hey, go for it! Just don't say we didn't warn you...