Because the Grandfather Problem 1.0 was too simple, here's the updated version.
Imagine you're a time traveler who's discovered a way to visit any moment in history. But, you've also discovered a way to send messages to your past self. Sounds simple, right?
Here's the catch: every time you send a message, you create a new timeline, but the new timeline is only slightly different from the original. It's a branching timeline, baby!
Now you have to decide whether to send a message to your past self, and risk creating a new reality where you're a famous time-traveling superhero, or leave things as they are and risk missing out on the opportunity of a lifetime.
It's a tough choice, but someone's gotta make it. What'll it be, time traveler? Hero mode or stick with the original timeline?