[sp3000]

If you presume rationality is the goal, then the rational mind should point to decades of research and anecdotal evidence that shows the positive effeccts of meditation and breathwork on mental well-being. Why are you assuming depriving your brain of oxygen for a short period of time is decreases the ability to think rationally? That could be a short term effect, but a long term adaptive effect could be the brain thinks more clearly. Same with fasting from food, etc.

[dukeofdoom]

Well, if one's thoughts can be altered depending on the amount of oxygen the brain receives. How can you possibly be sure about your own rationality. Couldn't you rationally start to question anything you've come to a conclusion about before, as just a byproduct of your brain's oxygen levels at that time.

[collingreen]

The best part about true things is they are still true whether you believe and understand them or not. Seeking truth isn't limited by your ability to understand everything.

[HK-NC]

Oddly enough becoming a serious athlete, changing my diet and training as my job, completely changed who I am and remembering my thought processes and overall mental state of the previous lifestyle is bizarre as though that person is truly alien to my current self.