I’ve spent 2 weeks vacationing above 6500 feet (~2000 meters) elevation. I still constantly feel like I’m not getting enough air. We actually have an oximeter with us and I’m consistently at 98%. Brain still thinks I’m oxygen-deprived. Brains are stupid.

— Lady Lakdawalla of Baltis Vallis (@elakdawalla) July 21, 2020

It’s wiser in these situations — by far — to trust how you feel. An oximeter isn’t the truth. It’s just some numbers on a screen. Plenty of people have been fine on paper and passed out/died at high elevation.

Quantification is a scam, in many ways. Especially as we use it. Your body is a far more accurate indicator of distress than some tech that has no nuance.