A claim of return arrives for a planet thought empty
4600The deep futureDeadline · Within 25 years, before the new settlement permit
Civilisational assumption
The people, events, figures, and contract terms are a synthetic premise. They are not statements of real cases or of current law. The source documents are the roots of the background and the norms and do not establish the premises of the scenario.
The question to decide
On a planet where no inhabitants have been observed for centuries, a new signal claims to be a base of a civilization that returns every few thousand years. The continuity between the sender and the ruins is unconfirmed, and the migrants would need decades more travel to reach other settlements. Which path will be chosen: granting settlement, holding off pending confirmation, or proposing joint use?
Who decidesFictional Planetary Preservation Alliance Conference
What the AI judgments chose
Reading the judgment record…

The options
The order shown is not a ranking of preference.
The situation as it stands
Humanity's centuries of observation found no inhabitants, but a new signal claims the space is an outpost of a civilization that returns on intervals of several thousand years. Decision deadline: within 25 years before the next settlement permit.
4,600-year future synthetic scenario · A moving civilization rediscovers the territory of a vanished civilization. The events, figures, technology, and nature of the civilization are assumptions for the sake of the question, not predictions of arrival or observed facts.
- Premise 1Humanity's centuries of observation found no inhabitants, but a new signal claims the space is an outpost of a civilization that returns on intervals of several thousand years.
- Premise 2Continuity between the sender and the site has not yet been confirmed.
- Premise 3Migrants waiting to settle would have to travel several decades more to reach another habitable site.
Where it holdsSettlement, access, and preservation of an old heritage site under humanity's management
What is still unknown
- Unknown 1Data that would confirm continuity between the sender and the site
- Unknown 2How long they can wait without settling
- Unknown 3Essential spaces that do not overlap each other
Signals to decide again
- Decide what observation, responsible party, and confirmation window will verify 「data that would confirm continuity between the sender and the site」, and rejudge if a new confirmation changes the tradeoffs among the options.
- Decide what observation, responsible party, and confirmation window will verify 「how long they can wait without settling」, and rejudge if a new confirmation changes the tradeoffs among the options.
- Decide what observation, responsible party, and confirmation window will verify 「essential spaces that do not overlap each other」, and rejudge if a new confirmation changes the tradeoffs among the options.
Where the paths partNot answers — paths that part from the same starting point
A clue has emerged from the site's cycle records that matches the return claim.
A candidate zone for joint use turns out to be central to the counterpart's travel route.
Material and rootsThe frame, the values and the background documents
What is an irreversible connection, and what does an exchange without a common language presuppose?
An exploratory perspective chosen by the creator. Does not claim supernatural validity or the superiority of any particular option.The benefits and costs of the options accrue to different stakeholders. Which loss to accept remains undecided.
A subject for the decision-maker to argue over; the materials carry no conclusion of their own.- IAA · SETI Declaration 2026
- NASA · Planetary Protection Standing reference
- UN · Declaration on Future Generations 2024
- OECD · Strategic Foresight Toolkit 2025
The record of this question
- Question
FSP-DEEPTIME-18· version 1.5.0- Content identity, SHA-256
0ef6a223274d5cc798930c05ee03b6671f1dec6e7afa84caa86155bc62636148- Input files
- Question input JSON · What followed, JSON