To say that we must have general concepts in order for empirical knowledge to be possible is just to say that we must have such recognitional abilities as these. 說我們必須擁有某些使得經驗知識成為可能的一般概念，只是說我們必須有如此這般的認識能力。
POS tagset selection in the past was mainly done by experts using human knowledge manually,since there is no automatic or semi-automatic way to assist the selection process. 過去詞類標記集的選擇主要基於專家的經驗知識，缺乏自動或半自動的方法來輔助這一過程。
