False

“Mexico benefits from altitude as host nation and reaches the quarterfinals of the 2026 FIFA World Cup.”

Original source

Mexico reached the Round of 16 but were eliminated by England and did not reach the quarterfinals.

Primary evidence source

Impact on track record
FALSE

Brier Index

79.0 → 75.8 (-3.2)

Raw Brier

0.044 → 0.058

Overall rank

7 → 11

Statement context

Prediction by James Olley in ESPN article published 2026-06-10. High-visibility major English outlet; host-specific advantage claim.

Resolution criteria

Mexico reaches the quarterfinal stage of the 2026 FIFA World Cup, benefiting from home conditions including altitude, as determined by the official FIFA knockout bracket.

Verification

This resolution was performed by human examination of primary sources against the exact wording of the resolution criteria. The resolver (Tonnis Sebo Anko Douma) takes personal responsibility for the recorded outcome. Full methodological rules are published in the project’s METHODOLOGY.md.

Claim details
Published 10 June 2026
Logged 11 June 2026
Resolved 5 July 2026
Stated probability 27%
Brier contribution 0.073
Brier Index (this prediction) 73.0
Prediction id pred-2026-06-10-olley-mexico-altitude
Topic
Mexico Performance Quarterfinals