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Let’s say it’s morning, and you’re getting dressed. As you put on your sneakers, a lace rips.
You could toss out the shoes, but they’re still good, apart from the broken lace. What other ideas come to mind? You could tie the two parts of the lace together. You could glue them. You could re-lace the shoe with just the longer part of the lace. You try to test the ideas until you find the one that works best. Welcome to the world of engineering — using what you know to invent, design, and build things that solve problems.
