AN elegant dinner at one of this town's finest restaurants, where a Hong Kong businessman is entertaining a mega-rich American tycoon and his family. Over the excellent repast, the conversation shifts from one gentle topic to another until the twentysomething daughter of the Stateside guest of honour decides to raise matters to a higher plane. She launches into a little homily assailing the Chinese for their ''abysmal human rights record'', adding for good measure: ''The attitude of Asians towards other Asians is disgraceful.'' As she pauses for breath, a guest grabs the chance to inquire whether she has ever visited China or even Asia before. ''No,'' she proclaims in her nasal drawl, ''but I watch CNN and I have been to San Francisco where there are a lot of Asians living.'' There's no answer to that, now is there?