Okay, so the author linked to the Seattle Times for a published citation of their measurement. And indeed the author's measurements are confirmed by Signani in

Okay, so the author linked to the Seattle Times for a published citation of their measurement. And indeed the author's measurements are confirmed by Signani in that very same article: https://www.seattletimes.com/seattle-news/climate-lab/mount-rainier-is-shrinking-and-now-has-a-new-summit/ https://www.seattletimes.com/seattle-news/climate-lab/mount-... That looks to me like a legitimate Wikipedia source. Plus it's recent and doesn't seem to be disputed by any other recent article. Is there a reason I'm missing on why this person isn't being allowed to update the elevation for Mt Rainier on Wikipedia?