Evidence Pros
Down the Rabbit Hole

Map Evidence Lab

Maps

Historical maps, projections, geographic evidence, scriptural cosmology, and institutional symbolism — with sources, uncertainty, and clear separation between artifact facts and interpretation.

Structured claim cards

Claims & counterclaims

Each card is one claim, quoted as it is commonly stated, with the strongest evidence on each side, the assumptions that must hold, and an explicit status. No card is published without a source and a counter-source of comparable quality.

  • Claim

    dismissed-with-cause
    "The U.S. Patent Office issued patent 497,917 to Alexander Gleason for a flat-earth map, thereby validating a flat-earth model."

    Best evidence for

    Patent 497,917 exists, was issued to Gleason in 1893, and the drawing depicts the Earth as a flat circular disk with the North Pole at center.

    Best evidence against

    The USPTO grants patents for novel, useful, non-obvious inventions; it does not adjudicate the truth of underlying scientific claims. The invention patented is a mechanical time-chart apparatus. Examiners are prohibited from rejecting an application on the ground that its underlying theory is scientifically wrong so long as the apparatus is operable — the map is a component of the machine, not an endorsed cosmology.

    Hidden assumptions

    • That a patent grant is an epistemic endorsement of the invention's underlying worldview.
    • That the map drawing is the claimed invention, rather than a diagram of a component within a mechanical apparatus.

    Status note

    The patent record is real; the inference from 'patent exists' to 'flat-earth model validated by the U.S. government' is not supported by patent-office procedure.

  • Claim

    plausible
    "Gleason's 1892 map is mathematically identical to the azimuthal-equidistant projection centered on the North Pole."

    Best evidence for

    Visually the two share the same structure: North Pole at center, meridians as straight radii, parallels as concentric circles, Antarctica stretched into an outer ring. Distances along any radius from the pole scale linearly with colatitude, matching azimuthal-equidistant math.

    Best evidence against

    Gleason's map is a mechanical time-chart drawing; the patent does not state a formal projection equation. Radial scale may deviate from azimuthal-equidistant in the outer band, and continent placement varies from a strictly georeferenced azimuthal-equidistant rendering. Calling it 'identical' overstates what the archival image proves without a georeferencing study.

    Hidden assumptions

    • That visual similarity of graticule structure implies mathematical equality of scale function.
    • That the archival scan can be measured precisely enough to distinguish 'azimuthal-equidistant' from 'approximately azimuthal-equidistant.'

    Status note

    Structurally consistent with north-polar azimuthal-equidistant; the strict 'identity' claim awaits a documented georeferencing check against control points.

  • Claim

    dismissed-with-cause
    "The United Nations emblem — a north-polar azimuthal world map framed by olive branches — proves that the UN's official position is that the Earth is flat."

    Best evidence for

    The emblem visibly uses a north-polar azimuthal map projection, which is the same family of projection as the Gleason 1892 map.

    Best evidence against

    The UN's own description states the emblem is 'a map of the world representing an azimuthal equidistant projection centred on the North Pole' — an explicit projection of a globe, chosen so that all inhabited countries appear on one disk. Using a projection is not a claim that the Earth is flat; every flat map is a projection of a curved surface.

    Hidden assumptions

    • That an organization's choice of visual emblem is a statement of scientific belief.
    • That any use of a flat map implies a flat-earth cosmology.

    Status note

    The emblem is a documented azimuthal-equidistant projection of a globe. The UN's own founding record explicitly describes it as a projection.

  • Claim

    unresolved
    "Actual scheduled flight times on long southern-hemisphere routes (e.g. Sydney–Santiago, Johannesburg–Perth) prove the Earth is a globe and disprove any flat-map model."

    Best evidence for

    Scheduled block times on carriers like LATAM (SYD–SCL) and Qantas (JNB–PER) are broadly consistent with great-circle distances on a mean-radius sphere at typical jet cruise speeds.

    Best evidence against

    The observation only rules out a competing model once that model's predicted distance is stated as a mathematical consequence of a specific projection, and once a cruise-speed band is specified. Absent both, a scheduled block time is a datum with a stated uncertainty, not a proof.

    Hidden assumptions

    • That a competing map's 'distance' is well-defined without stating its projection.
    • That block time equals in-air distance divided by a fixed ground speed with no wind, routing, or reserves.

    Status note

    Consistent with the spherical model at ordinary cruise; distinguishes competitors only when the competitor's distance math is stated explicitly. See the Routes tab for per-route accounting.

  • Claim

    dismissed-with-cause
    "Isaiah 40:22 ('the circle of the earth') explicitly proves that scripture teaches a spherical Earth."

    Best evidence for

    Some commentators regard the circular language of chug ha-aretz as compatible with a globe, and later paraphrases sometimes render it 'circle' in a way readers take as a sphere. This is a compatibility reading, not a lexical claim that chug means 'sphere.'

    Best evidence against

    The Hebrew word is chug (חוּג) — circle, compass, or circuit — not kaddur (כַּדּוּר), 'ball,' which Isaiah himself uses in Isaiah 22:18. 'Ball' language was available to the prophet and was not chosen. No cited Hebrew lexicon (BDB, HALOT) defines chug as 'sphere.' The circular imagery supports flat-circle, horizon/circuit, and globe-compatibility readings, but the verse does not explicitly describe three-dimensional geometry.

    Hidden assumptions

    • That a poetic hymnic text is making a technical three-dimensional geometric claim.
    • That 'compatible with a globe' is equivalent to 'explicitly describes a sphere.'
    • That chug and kaddur are interchangeable, despite Isaiah's own distinct use of kaddur in 22:18.

    Status note

    Isaiah 40:22 cannot honestly be used as explicit proof that Scripture calls Earth a sphere. The flat-circle reading is a supported interpretation of the circular imagery; the globe reading is a compatibility interpretation. Any claim about exact three-dimensional geometry from this verse is interpretive, not explicit.

New leads may be submitted via Submit a Lead and enter the same review pipeline as evidence intake.