> A given problem, such as the integral we just computed, may appear to be intractable on its own. However, by stepping back and considering the problem not in

> A given problem, such as the integral we just computed, may appear to be intractable on its own. However, by stepping back and considering the problem not in isolation but as an individual member of an entire class of related problems, we can discern facts that were previously hidden from us. A professor put it this way: "the more you assume, the more you can prove"