The whole saga had provided a valuable lesson: trust your gut, but also test it. Before you do anything concrete, the data has to agree. We’d suspected that next-day delivery was important, but we’d been myopic in our analysis of our tests, so we hadn’t understood why. It took an additional test, with a truly outside-the-box execution, to understand what we’d already intuited to be true. And once we understood it, we could refine the idea and maximize its potential—which was huge. Next-day delivery was like magic. We knew it had to be part of our plans going forward. Now we just needed to
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