I disagree with the proof here. He implies that the two statements: Asian children have a simpler number system vocabulary. - and - Asian children learn to cou

I disagree with the proof here. He implies that the two statements: Asian children have a simpler number system vocabulary. - and - Asian children learn to count at a younger age. prove the third: A simpler number system vocabulary allows children to count at a younger age. This may be true, but he implies it as fact, without even granting that they may be other factors at work. Like a better education system perhaps.