system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How did the North Sentinel Island people get there?
gpt
The other person saying likely either by boat or now-non-existent land bridge is correct.

You also need to remember that we currently suspect the Sentinelese have been by themselves on that island for 50,000 years (!!!). So it's nearly impossible to know for sure how they got there. Even they themselves wouldn't know for sure, and even so they don't talk to us.