"Oh, not necessarily," By replies. "I mean, you might not necessarily be on Earth at all. You could be on another terraformed planet you're told was Earth. Someone could have seeded that planet with a human population, and then a genengineered population of your not-dead men, left them to shamble about..." He strokes his beard thoughtfully as he considers the possible culprits in that scenario. "Beta Colony would have the resources and technology to do that handily enough, but they wouldn't, bless their soft hearts. Jackson's Whole might be able to and would, if they could hang up enough cameras, make it into some sort of holodrama - but they'd also want to have people pay to watch it, and no such thing has been advertised. So if it were anyone, it would be Cetaganda, trying to have you fight to the death so that the most genetically superior could be airlifted out to have their genes extracted and spliced into the next generations."

What a dreadful thought. And how...plausible. Well, plausible morally. Not in terms of practicality.

"But - yes. That would be an enormous undertaking. Hiding a livable terraformed planet alone - that would be phenomenally difficult. The heretofore unknown seems more likely than the wildly implausible."