Sometimes it may not be obvious which things matter the most; this can be particularly hard for younger developers who don’t have much experience. In these situations I recommend making a hypothesis: “I think this is what matters most.” Then commit to that hypothesis, build the system under that assumption, and see how it works out. If your hypothesis was right, think about why it ended up being right, and what clues there might have been that you can use in the future. If your hypothesis was wrong, that’s still OK: think about why it ended up being wrong, and whether there were clues that you
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