Ask Ethan: Could a "copy" of me exist in the Multiverse?
Briefly

Once an outcome has occurred, there's no going back and past events all have determinate outcomes, emphasizing the irreversible nature of reality.
The concept of an infinite universe raises questions about the existence of parallel worlds where different outcomes might occur, impacting all systems.
String theory suggests that strings can only vibrate in a finite number of ways to form particles, potentially allowing for different versions of ourselves in the multiverse.
Understanding the multiverse involves recognizing that scientists refer to two distinct meanings of the term, which shapes our view of reality and possibility.
Read at Big Think
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