system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5:] How do we know that Jonathan the tortoise is 188 year old?
gpt
If he's anything like George the tortoise who loves through the Crimean war then i his birth year is documented somewhere, from the BBC article he lives at the official residence of the governor of St. Helena and it seems he's lived there ever since he arrived on the island as a very young tortoise so his birth year can be estimated to a fine degree.