[sooheon]

There's good evidence to think complex cognitive tasks (like strategizing, coding...) suffer with CO2 > 1000 ppm

https://www.sciencedirect.com/science/article/pii/S036013232...

[infecto]

I do believe the science is out in areas like the described, it could very well impact high cognitive tasks and can easily imagine that being true. I still don't believe it is suffocating the brain like described by the poster.