All reading, in truth, is reading in a content area. To read the phrase "the law of diminishing returns" or "the law of supply and demand" requires that you know how the word "law" is used in economics, for it does not mean what it does in the phrase "the law of inertia" (physics) or "Grimm's law" (linguistics) or "the law of the land" (political science) or "the law of survival of the fittest" (biology). To the question, "What does 'law' mean?" the answer must always be, "In what context?"

Language Education in a Knowledge Context (1980)