– **127 hours (duration):** The film title refers to the duration of entrapment. Various sources give slightly different figures; the film’s title should be understood as a shorthand designation rather than a precisely timed measurement.
– **13-man retrieval crew:** Attributed to Tom Brokaw in the Wikipedia account. Not independently corroborated from primary rescue records in sources accessed for this article.
– **Amputation procedure:** Described in this article only at the high level required by the article’s safety guardrails. No procedural detail, anatomical instruction, or step-by-step account of the amputation is included.
**Access limitations:** The Aron Ralston blog (aronralston.wordpress.com) was listed as a source starter in the editorial brief; the URL was not fetched during research. The National Geographic article (July 2003) was listed as a research lead but not fully accessed; only an indexed excerpt was available. The primary sources used were the Wikipedia articles, the Outside 2003 feature, the Los Angeles Times reprinted coverage, and the 5280 retrospective.
**Film vs. memoir:** The film 127 Hours is not treated as an authoritative source for what happened in Blue John Canyon. Where the film and Ralston’s own accounts diverge, Ralston’s accounts take precedence.