Imagine that you own a chocolate factory. You are in the middle of a large- scale production when your sugar silo is suddenly, and quite unexpectedly, empty. Why? Because the devices that are supposed to tell you how much sugar is in that silo have all failed. Who can you borrow sugar from? Do you know anybody who has upwards of a couple thousand cups of it lying around? This was precisely the problem for a chocolate company in Ontario, Canad

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