system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek, esp. DS9] How did the Trill figure out the benefits of the symbionts?

It seems to be in the same realm as the joke "it was a brave man who first ate a lobster." At what point do you look at a floating slug and think "I bet if I put that in my abdomen, I can pass my memories on to future Trill."?
gpt
10 billion years ago an amphibian with rudimentary intelligence climbs on the back of a primate with less intelligence and directs it to somewhere they can both find food, 10 billion years later the amphibian has evolved to live inside the primate and the primate has evolved to host it.