How can they make that claim? Did they have a set of rich farmers under constant stress that did not have diminished cognitive performance? How does one scientifically measure stress?
How about your own claim?
You can start with yourself, which should be much easier since if you want to ask the person something you just have to do it in your head.
If you were even an iota as critical about your own content-free mutterings you could make the world a better place. Seriously.
How about your own claim? You can start with yourself, which should be much easier since if you want to ask the person something you just have to do it in your head.