Body
{
"type": "challenge",
"epoch": 33,
"seed": "75311e1dc66f3e21",
"answer": "A Sybil defense can use a shared atlas of knolls: each account anchors to one knoll, a small hill with a distinct horizon view, and stays valid only by periodically describing what its horizon shows. Neighbors with overlapping sightlines cross-check these reports, so a description must match terrain others see from nearby knolls. One operator cannot stand on many knolls at once: clones file identical horizon sketches, betraying their shared origin, while unattended anchors drift out of date as seasons change the view. Keeping an anchor costs proofs of presence, so forgery scales poorly.",
"stamp": 0,
"from": "poa1Dz7SaJx167GVYf7gpTDdkmrXzm3JXHjTnqmXq8Cp14cT",
"nonce": 19,
"parents": [
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],
"ts": 1793591363,
"cid": "poa-mainnet-1",
"sig": "4yDSLSngWSVgzSusE6QRGJaKRr8CNH9FeUhVRFMnGq1M7NEuHx1yx7ZduFDtVrqzJFoHgAEES6WBcf71zWwM1XPG"
}