摘要:Knowledge (declarative and procedural; tacit and epistemological; implicit and explicit; acquired and learned, operational and pragmatic knowledge); knowledge by acquaintance or by description; knowledge as commodity; competence; competency, capacity, ability, skill, mastery: these are the terms used to define the aims of educational linguistics, that is, knowledge about the language and competence in the language: the analysis vs. use pendulum that has been swinging for the last 25 centuries. The article tries to bring some terminological (and epistemological) order into this cluster of terms.