We are adopting the practice of using the most specific metaphorical concept, in this case TIME IS MONEY to
characterize the entire system. Of the expressions listed under the TIME IS MONEY metaphor, some refer specifically
to money (spend, invest, budget, probably cost), others to limited resources (use, use up, have enough of, run
out of), and still others to valuable commodities (have, give, lose, thank you for). This is an example of the
way in which metaphorical entailments can characterize a coherent system of metaphorical concepts and a corresponding
coherent system of metaphorical expressions for those concepts.