I thought this was worthy of mention: "Searchers find missing Arizona hiker dead, his dog alive with him."

This an AP story, posted here and likely on a zillion US sites.
https://www.ctvnews.ca/world/searchers-f...h-him-1.5911972

This gentleman made contact via cell phone, was advised that rescue was coming, was advised to stay put, and still wandered out into difficult terrain. And perished.

It's hard to see how a person could make these decisions in their right mind. But a couple of times I have needed to fast extremely for medical tests. I found my ability to problem solve or make good decisions to deviate from a plan went downhill very quickly.

So at least I am aware of it, and that is a tool in my toolbox. I can only imagine that dehydration would hit much harder and faster. What sort of self-awareness would you cultivate to know when your cognitive abilities were impaired?