system
Given the following post, respond as if you're commenting on Reddit:
human
[the culture] are drones human conscience in robotic bodies or are they sentient machines ?

And what's this 1:1 intelligence, is it a rating system for how smart a thing is ?
gpt
They're sentient machines created and raised in such a way that they can interact with humans in a natural fashion. 
It's possible for humans to become drones, but this is considered eccentric and would result in awkward interactions with other drones.

Drones tend to have mental capacity generally similar to humans, or at least within the same order of magnitude, as opposed to Minds who may as well be gods compared to us (they simulate universes for fun, for pete's sake).

It seems drones have a lineage going back all the way to AIs created before the creation of the Culture meta-civilisation, and may well share origins with the Minds.