The issue with your original comment is that it’s simplified on many levels beyond what is acceptable. China has companies working on delivering highest financial output regardless of other citizens and their rights to have fair share in produced goods. They are by no means controlled by workers (why would they accept e. g. 996?) nor creating fair rules to others economically (e.g. Taobao and their alghorims pushing many sellers to sell bellow profitable levels just to maintain visibility on their site). Put it also into wider perspective: China started to move forward in quality of life only after Deng. US system is by no means bad but it doesn’t make Chinese one perfect.

You don’t even realise how strong capitalism is in China.

D-ark MAGA

Such a small groups are fine for initial investigation, they have enough of a size to be acceptable statistically for most of the performed studies. I don’t think they’d get approval from ethical committee overseeing animal experiments without initial study like this to conduct something on very high groups.

Can you elaborate why do you think that water is improper control?

Those overly negative comments often come from USA. I’ve never had any major problems with self checkout in Europe and I generally go there as it’s faster and you don’t have to race against the cashier. Of course some chains have worse self checkouts, some have better but overall many people like it a lot. Even some older people who are not tech savvy use them.