Is 'After the purge of foreigners, only a few stayed on, strictly confined to Dejima Island in Nagasaki Bay.' a clear rebuttal of the premise 'A few foreigners were confined to Dejima Island because they were dangerous.'
After the purge of foreigners, only a few stayed on, strictly confined to Dejima Island in Nagasaki Bay.###A few foreigners were confined to Dejima Island because they were dangerous.