student asking question

What does "stack up" mean?

teacher

Native speaker’s answer

Rebecca

In this context, "stack up" is an informal expression that means to "make sense" or "measure up." The speaker has used this expression to draw attention to the contradiction between increased awareness about fashion's sustainability problem, and the increased consumption of fast fashion at the same time. These two seem to contradict each other and don't make sense, which is why it doesn't "stack up." We can use this expression to describe similar situations. Ex: Your income has increased but you save less money each month. It doesn't stack up. (It doesn't make sense.) Ex: Our amateur baseball team doesn't stack up against professional teams. (Our amateur baseball team doesn't measure up against/compare with professional teams.)

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