The standard readings: guns, covered wagons, longhorn cattle, railroad tracks, telegraph and power lines, paved highways, oil spills, the 1960s counterculture. The ninth sign stays pending: the falling sky-dwelling and the blue star, the end of Hopi ceremonialism. The checklist circulates attached to White Feather's name via Waters' 1963 book and David Young's pamphlet account of a 1958 roadside encounter.
Every fulfillment was assigned after the fact, and no two published versions of the list match exactly. Snakes of iron served for the railroad, then for anything linear; the spider's web served telegraph lines, then power grids, then the internet. A sign that can absorb every technology cannot be falsified by any technology.
Geertz's 1994 study argues Hopi prophecy is continuously recreated to interpret the present, which is exactly what the checklist does best. Banyacya read it at the UN in 1976 and 1992; New Age print read it through the Harmonic Convergence; video essays now read 3I/ATLAS and the ISS into the ninth sign. The list's durability is the feature, not the bug.
A checklist that only ever matches the past is not a prediction but a mirror; what would it take for the ninth sign to fail?