www.lesswrong.com/posts/J3wemDGtsy5gzD3xa/toni-kurz-and-the-insanity-of-climbing...

Reliable references list the Eiger’s elevation as 3,967 m (13,015 ft). That makes the post’s description of the Eiger as a “14,000 foot peak” incorrect by roughly 1,000 feet.

• Wikipedia’s Eiger article lists the mountain’s elevation as 3,967 m (13,015 ft).
• National Geographic also describes the Eiger as 13,015-foot.

Therefore, while “Eigerwand” does refer to the Eiger’s north face, the height given in the quoted claim is wrong.

The post’s wording describes Messner as the first person to summit Everest without supplemental oxygen. But major references describe the feat as a joint first ascent by Reinhold Messner and Peter Habeler on 8 May 1978.

• Guinness World Records lists the “First ascent of Everest without supplementary oxygen” as achieved by Reinhold Messner, Peter Habeler on 08 May 1978.
• Wikipedia’s Messner biography likewise says he made the first oxygenless ascent “along with Peter Habeler.”

So the claim is inaccurate as stated: Messner was one of the first two, not the sole first.

In the 1936 Eiger north face disaster, only Toni Kurz was still alive during the final rescue attempt; Willy Angerer had already died.

Wikipedia’s summary of the event explains that Angerer fell and was killed, and that only Kurz survived, hanging on the rope and later trying to reach rescuers. That directly contradicts the post’s sentence saying “Willy managed to ... haul the rope,” which assigns Kurz’s actions to the already-dead Angerer.

This appears to be a name mix-up in the post, but it is still factually incorrect as written.