They exist in the math. I don't think anyone thinks they exist in real life.
Madness string 23967
He is better than anyone else I know at taking a Victorian story, translating it into the 21st century, and making it more sexist than the original in the process. That's a pretty impressively abject feat.
The vast majority of the universe is composed of dark matter. The fragile balance depends on things we'll never be able to see, hear, smell, taste, or touch. Life itself depends on them. What's real? What isn't real? Maybe those aren't the right questions to be asking. What does life depend on?