The assumption is that humanity died out while Lister was stasis. Can we establish a terminus post quem for humanity's presumed extinction? For example in Out of Time we encounter the Gemini 12, and we are told it was crewed by humans from the 28th century. So humanity continued to exist for at least seven centuries while Lister was in stasis. Are there any later attestations to humans still existing? This is not counting humans in stasis, humans in stasis in the form of monkeys, humans from alternative dimensions, humans resurrected by nanobots, or anything in between. I mean proper human civilisation(s) still existing in the main timeline.