Is 'Even on so small an island as Taiwan the Mandarin-speaking ex-mainlanders cannot converse with the Taiwanese-born majority who have not bothered to learn Mandarin.' an autonomous statement, not logically connected to 'Everyone who lives in Taiwan is able to speak Mandarin.'
Even on so small an island as Taiwan the Mandarin-speaking ex-mainlanders cannot converse with the Taiwanese-born majority who have not bothered to learn Mandarin.###Everyone who lives in Taiwan is able to speak Mandarin.