what is grandfather paradox? explain it in simple terms.
If a person went back in time and prevented their grandparents from having children in some way or another, the person who went back in time wouldn't have parents since their grandparents never had children. Which means the person couldn't exist since their parents don't exist. So this begs the question, who went back in time if that person never existed? That is why it's called a paradox.
Could you give me an example but with a guy named Saint Spillertilly.